Where does Zhejiang Huahai Pharmaceutical Co., Ltd. rank among US patent assignees?

According to USPTO PatentsView (2015–2025 granted utility patents), Zhejiang Huahai Pharmaceutical Co., Ltd. ranks #6,098 of 49,997 assignees by granted-patent volume, the same sort as the companies listing and top-holders ranking. See /methodology/#corpus-placement.

How many patents does Zhejiang Huahai Pharmaceutical Co., Ltd. hold?

Zhejiang Huahai Pharmaceutical Co., Ltd. holds 56 US utility patents granted between 2015 and 2025, spanning 17 technology areas.

What is Zhejiang Huahai Pharmaceutical Co., Ltd.'s Innovation Score?

Zhejiang Huahai Pharmaceutical Co., Ltd. has an Innovation Score of 39.7 out of 100 (top 37% of the corpus). This composite metric weighs portfolio volume (40%), grant velocity (20%), technology breadth (25%), and claim depth (15%).

What technology areas does Zhejiang Huahai Pharmaceutical Co., Ltd. focus on?

Zhejiang Huahai Pharmaceutical Co., Ltd.'s top technology area is C07D (Heterocyclic Compounds) with 41 patents, ranking #200 of 3,165 assignees active in that subclass. Grants appear in 17 CPC subclasses total.

Is Zhejiang Huahai Pharmaceutical Co., Ltd.'s patent grant rate increasing or decreasing?

Zhejiang Huahai Pharmaceutical Co., Ltd.'s recent grant velocity is +60% compared to the prior five-year period (grant years, not application filing dates). This indicates accelerating grant output.

What does claim depth mean for Zhejiang Huahai Pharmaceutical Co., Ltd.'s patents?

Zhejiang Huahai Pharmaceutical Co., Ltd.'s patents average 12.7 claims each. This is an aggregate descriptive count from the grant record; it does not establish claim scope, legal strength, enforceability, or design-around risk.

How is the Zhejiang Huahai Pharmaceutical Co., Ltd. patent data sourced?

All patent data comes from USPTO PatentsView, a public research dataset maintained by the United States Patent and Trademark Office covering US granted utility patents from 2015 to 2025.

USPTO 2015–2025 USPTO PatentsView Foreign Corporation

Zhejiang Huahai Pharmaceutical Co., Ltd.

USPTO PatentsView assignee record - 56 granted patents across 17 technology areas, recorded in grant years 2015–2025. Grant-trend analysis is cross-referenced to USPTO Patent Public Search; it does not measure application filings, current R&D, or legal strength. Primary class: C07D (Heterocyclic Compounds).

Compiled by PlainPatent · May 15, 2026

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The verdict

According to USPTO PatentsView, Zhejiang ranks #6,098 of 49,997 tracked US assignees by granted-patent volume, with 56 patents across 17 technology areas.

#6,098
of 49,997 US assignees by volume: Top 37%
by Innovation Score (39.7/100): 12.7
avg claims per patent: +60%
grant velocity, last 5 yrs

USPTO PatentsView assignee plate

Corpus R6098 · Foreign Corporation #6,098 · 56 grants

GRANTS-SMALL · UPPER-Q · PHOTO-FINISH · CPC-FOCUS · INNOV-THIN · CLAIMS-RICH · TYPE-FRNCORP · VEL-SURGE · BOOK-FULL

GRANTS-SMALL 56 grants
UPPER-Q #6,098/49,997
PHOTO-FINISH Voestalpine Stahl
CPC-FOCUS C07D · 17 areas
INNOV-THIN 39.7/100
CLAIMS-RICH 12.7 claims/avg
TYPE-FRNCORP Foreign Corp
VEL-SURGE +60% vel
BOOK-FULL 10/10 fields

Nearest grant-volume peer: Voestalpine Stahl GmbH (±0 grants)

Instrument codes from this assignee’s USPTO PatentsView grant sheet: volume band, corpus rank, photo-finish peer, lead CPC, Innovation Score, claim depth, assignee type, velocity, and book completeness. Not a USPTO rating of patent strength.

How Zhejiang’s 39.7 Innovation Score adds up

The same four weighted components behind every Innovation Score on PlainPatent: portfolio volume, grant velocity, technology breadth, and claim depth.

Volume 14.0 pts (35%) Velocity 3.6 pts (9%) Breadth 14.6 pts (37%) Claim depth 7.6 pts (19%)

Qualcomm Incorporated · highest

85
Centre Hospitalier… · near

40
Cibt America · near

40
Futura S P A · near

40
UIH America · near

40
Zhejiang Huahai… · this assignee

40
3D Lighting… · lowest

7

What this shows Zhejiang's Innovation Score is 39.7/100 (top 37% of the PatentsView-derived corpus). The chart places that score against the nearest Innovation Score peers plus corpus poles, not a reprint of the volume ranking.

Does more volume mean deeper claims for Zhejiang?

Each dot is one of Zhejiang’s 8 nearest volume peers (same corpus rank neighbourhood as the chart above), placed by total granted patents (horizontal) against average claims per patent (vertical). Zhejiang’s own 12.7 claims/patent is at or below the 13.0 median for these volume peers. Volume here does not track with deeper claims; several lower-volume peers claim more thoroughly per patent.

Zhejiang vs its 8 nearest volume peers: granted patents vs average claims per patent. Source: USPTO PatentsView.

Where Zhejiang's grants concentrate

Zhejiang Huahai Pharmaceutical Co., Ltd. is a focused PatentsView assignee: 17 CPC subclasses with 73.2% of grants classified under C07D (Heterocyclic Compounds). Peak complete grant year is 2020 (11 grants) versus a trough of 3 in 2017. By volume, Zhejiang sits between Voestalpine Stahl GmbH and Zonit Structured Solutions, LLC.

Zhejiang's three-year grant acceleration

From 2019–2021 to 2022–2024, Zhejiang Huahai Pharmaceutical Co., Ltd. moved from 26 to 14 grants (0.54x the prior three-year total, a multiple, not a CAGR). See the growth leaderboard.

Voestalpine Stahl

56
Wittenstein SE

56
Yamaguchi Univers…

56
Yamaichi

56
Zenpayroll

56
Zhongshan Innoclo…

56
Zillow

56
Zonit Structured…

56
Zhejiang Huahai P… ◀

56

What this shows Zhejiang holds 56 patents at rank #6,095, shown against the 8 assignees closest to it in grant volume rather than the industry's largest filers.

Companies ranked near Zhejiang

By rank, the assignees closest to #6,095 in granted patent volume.

Leaders in C07D (Heterocyclic Compounds)

Other assignees with the most granted patents in Zhejiang's primary technology class.

Assignees with similar portfolio profiles

Two PlainPatent-derived peer sets for Zhejiang, neither rank-band nor same-CPC leaders (those blocks stay above). In C07D (Heterocyclic Compounds), Zhejiang ranks #200 of 3,165 assignees by patent count in that subclass.

Similar innovation score

Nearest assignees by Innovation Score (40 here).

UIH America, Inc. 40 Cibt America Inc. 40 Futura S.P.A. 40 Centre Hospitalier Universitaire Vaudois (C.H.U.V.) 40

Similar claim depth

Nearest assignees by average claims per patent (12.7 here).

KMW Inc. 12.7 avg Nanya Technology Corporation 12.7 avg Vetco Gray Scandinavia AS 12.7 avg Neonode Inc. 12.7 avg

Zhejiang's Innovation Score vs. every tracked assignee

Composite of portfolio volume, grant velocity, technology breadth, and claim depth (0–100)

40 Top 37% higher than 63% of 49,997 US assignees

Each bar is a band; taller bars hold more US assignees. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count, share, and where it sits relative to this entry.

Source USPTO PatentsView, PlainPatent Innovation Score · 2015–2025

USPTO utility patent grants by year · 2015–2025

Grants by year

Teal-shaded recent years (2020–present) versus the 2015–2019 baseline. Full figures in the table below.

View data table

Zhejiang Huahai Pharmaceutical Co., Ltd. patent grants by year, 2015–2025
Year	Patents Granted	Share of Period
2015	5	8.9%
2017	3	5.4%
2018	4	7.1%
2019	8	14.3%
2020	11	19.6%
2021	7	12.5%
2022	5	8.9%
2023	3	5.4%
2024	6	10.7%
2025partial year	4	7.1%

Which technologies does Zhejiang Huahai Pharmaceutical Co., Ltd. patent most?

C07D - Heterocyclic Compounds 41

C07C - Acyclic OR Carbocyclic Compounds 22

C07B - General Methods OF Organic CHEMISTRY; Apparatus Therefor 10

A61P - Specific Therapeutic Activity OF Chemical Compounds OR Medicinal Preparations 9

A61K - Preparations FOR Medical, Dental OR Toiletry Purposes 9

Y02P - Climate Change Mitigation Technologies IN THE Production OR Processing OF Goods 6

C07F - Acyclic, Carbocyclic OR Heterocyclic Compounds Containing Elements Other Than Carbon, Hydrogen, Halogen, Oxygen, Nitrogen, Sulfur, Selenium OR Tellurium 4

B01J - Chemical OR Physical Processes, e.g. Catalysis OR Colloid CHEMISTRY; Their Relevant Apparatus 3

B01D - Separation 3

C07J - Steroids 2

C07H - SUGARS; Derivatives THEREOF; NUCLEOSIDES; NUCLEOTIDES; Nucleic Acids 1

F26B - Drying Solid Materials OR Objects BY Removing Liquid Therefrom 1

C12P - Fermentation OR Enzyme-using Processes TO Synthesise A Desired Chemical Compound OR Composition OR TO Separate Optical Isomers From A Racemic Mixture 1

C12Y - Enzymes 1

C12N - Microorganisms OR ENZYMES; Compositions THEREOF; Propagating, Preserving, OR Maintaining MICROORGANISMS; Mutation OR Genetic ENGINEERING; Culture Media 1

Top 15 of 17 technology areas

More on this record

Data Source

USPTO PatentsView, US granted patents 2015–2025

View all rankings → How is Innovation Score calculated?

What to do with this data

Zhejiang Huahai Pharmaceutical Co., Ltd.'s patent record in context - here's where to go next.

Zhejiang Huahai Pharmaceutical Co., Ltd.'s lead technology class is C07D (Heterocyclic Compounds), 73.2% of its portfolio - see every assignee active in that class. Explore C07D
Ranked #6,098 of 49,997 tracked assignees by patent volume - see the full leaderboard. See the ranking
Compare Zhejiang Huahai Pharmaceutical Co., Ltd. against Voestalpine Stahl GmbH, an assignee filing at a similar volume. Compare portfolios
Innovation Score of 39.7/100 blends volume, velocity, technology breadth, and claim depth. How it's calculated

Figures reflect USPTO PatentsView grant data through May 2026; pending applications not yet granted are not counted.

Data sourced from USPTO PatentsView - official U.S. government patent data. See our methodology for computation details. Retrieved and formatted by PlainPatent

Disclaimer: This information is provided for informational purposes only and does not constitute professional advice. Data is sourced from the USPTO PatentsView database. Consult a qualified professional before making decisions based on this data.

Read our methodology - how this data is sourced, computed, and verified.

Data sources used on this page

USPTO PatentsView - the disambiguated bulk patent-grant, assignee, and CPC data this page's figures are derived from. patentsview.org
Cooperative Patent Classification (CPC) - the joint USPTO/EPO classification scheme used to group patents by technology area. cooperativepatentclassification.org
USPTO Patent Public Search - the official interface to verify the status of any individual patent. ppubs.uspto.gov

Compiled by PlainPatent, US Patent Intelligence Editorial Process · May 15, 2026

Every figure on PlainPatent is rendered directly from USPTO source data, no number is typed in by an editor. This page draws directly on USPTO source data, no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of May 2026.