Where does Shanghai Huachang Environmental Protection Co., Ltd. rank among US patent assignees?

According to USPTO PatentsView (2015–2025 granted utility patents), Shanghai Huachang Environmental Protection Co., Ltd. ranks #37,437 of 49,997 assignees by granted-patent volume, the same sort as the companies listing and top-holders ranking. See /methodology/#corpus-placement.

What is Shanghai Huachang Environmental Protection Co., Ltd.'s Innovation Score?

Shanghai Huachang Environmental Protection Co., Ltd. has an Innovation Score of 44.8 out of 100 (top 25% of the corpus). This composite metric weighs portfolio volume (40%), grant velocity (20%), technology breadth (25%), and claim depth (15%).

What technology areas does Shanghai Huachang Environmental Protection Co., Ltd. focus on?

Shanghai Huachang Environmental Protection Co., Ltd.'s top technology area is B01D (Separation) with 4 patents, ranking #1,134 of 3,536 assignees active in that subclass. Grants appear in 11 CPC subclasses total.

Is Shanghai Huachang Environmental Protection Co., Ltd.'s patent grant rate increasing or decreasing?

Shanghai Huachang Environmental Protection Co., Ltd.'s recent grant velocity is -25% compared to the prior five-year period (grant years, not application filing dates). Grant activity has slowed relative to earlier years.

What does claim depth mean for Shanghai Huachang Environmental Protection Co., Ltd.'s patents?

Shanghai Huachang Environmental Protection Co., Ltd.'s patents average 9.9 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.

USPTO 2015–2025 USPTO PatentsView Foreign Corporation

Shanghai Huachang Environmental Protection Co., Ltd.

Q: How many patents does Shanghai Huachang Environmental Protection Co., Ltd. hold?

Shanghai Huachang Environmental Protection Co., Ltd. holds 7 US utility patents granted between 2016 and 2024, spanning 11 technology areas.

Q: How is the Shanghai Huachang Environmental Protection 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 PatentsView assignee record - 7 granted patents across 11 technology areas, recorded in grant years 2016–2024. 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: B01D (Separation).

Compiled by PlainPatent · May 15, 2026

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The verdict

According to USPTO PatentsView, Shanghai ranks #37,437 of 49,997 tracked US assignees by granted-patent volume, with 7 patents across 11 technology areas.

#37,437
of 49,997 US assignees by volume: Top 25%
by Innovation Score (44.8/100): 9.9
avg claims per patent: -25%
grant velocity, last 5 yrs

USPTO PatentsView assignee plate

Corpus R37437 · Foreign Corporation #37,437 · 7 grants

GRANTS-MICRO · MID-PACK · PHOTO-FINISH · CPC-FOCUS · INNOV-PAR · CLAIMS-PAR · TYPE-FRNCORP · VEL-DOWN · BOOK-FULL

GRANTS-MICRO 7 grants
MID-PACK #37,437/49,997
PHOTO-FINISH Serenity Data Security
CPC-FOCUS B01D · 11 areas
INNOV-PAR 44.8/100
CLAIMS-PAR 9.9 claims/avg
TYPE-FRNCORP Foreign Corp
VEL-DOWN -25% vel
BOOK-FULL 10/10 fields

Nearest grant-volume peer: Serenity Data Security, LLC (±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 Shanghai’s 44.8 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 7.2 pts (16%) Velocity 20.0 pts (45%) Breadth 11.7 pts (26%) Claim depth 5.9 pts (13%)

Qualcomm Incorporated · highest

85
Shanghai Huachang… · this assignee

45
3D Lighting… · lowest

7

What this shows Shanghai's Innovation Score is 44.8/100 (top 25% 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 Shanghai?

Each dot is one of Shanghai’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). Shanghai’s own 9.9 claims/patent is ABOVE the 5.9 median for these volume peers. More thorough claims than most filers at this scale, not just more of them.

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

Where Shanghai's grants concentrate

Shanghai Huachang Environmental Protection Co., Ltd. is a focused PatentsView assignee: 11 CPC subclasses with 57.1% of grants classified under B01D (Separation). Peak complete grant year is 2018 (2 grants) versus a trough of 1 in 2016. By volume, Shanghai sits between Serenity Data Security, LLC and Shannon Specialty Floors, Inc..

Shanghai's three-year grant acceleration

Shanghai Huachang Environmental Protection Co., Ltd. shows 3 grants in 2022–2024 against only 0 in 2019–2021. That prior window is too thin for a growth multiple (rename and spin-out assignees look artificially high when the baseline is near zero), so PlainPatent withholds a ranked acceleration claim here.

Serenity Data Sec…

7
Servicetitan

7
Shandong Huaxia S…

7
Shanghai Fudan Mi…

7
Shanghai Maodouya…

7
Shanghai Ninth Pe…

7
Shanghai Pioneer…

7
Shannon Specialty…

7
Shanghai Huachang… ◀

7

What this shows Shanghai holds 7 patents at rank #37,583, shown against the 8 assignees closest to it in grant volume rather than the industry's largest filers.

Companies ranked near Shanghai

By rank, the assignees closest to #37,583 in granted patent volume.

Leaders in B01D (Separation)

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

Shanghai's Innovation Score vs. every tracked assignee

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

45 Top 25% higher than 75% 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 · 2016–2024

Grants by year

Teal-shaded recent years (2020–present) versus the 2016–2019 baseline. Full figures in the table below.

View data table

Shanghai Huachang Environmental Protection Co., Ltd. patent grants by year, 2015–2025
Year	Patents Granted	Share of Period
2016	1	14.3%
2017	1	14.3%
2018	2	28.6%
2023	1	14.3%
2024	2	28.6%

Which technologies does Shanghai Huachang Environmental Protection Co., Ltd. patent most?

B01D - Separation 4

C10G - Cracking Hydrocarbon OILS; Production OF Liquid Hydrocarbon Mixtures, e.g. BY Destructive Hydrogenation, Oligomerisation, Polymerisation ; Recovery OF Hydrocarbon Oils From Oil-shale, Oil-sand, OR GASES; Refining Mixtures Mainly Consisting OF HYDROCARBONS; Reforming OF NAPHTHA; Mineral Waxes 3

C02F - Treatment OF Water, Waste Water, Sewage, OR Sludge 3

B01J - Chemical OR Physical Processes, e.g. Catalysis OR Colloid CHEMISTRY; Their Relevant Apparatus 2

E21B - Earth OR Rock DRILLING; Obtaining OIL, GAS, Water, Soluble OR Meltable Materials OR A Slurry OF Minerals From Wells 1

Y02C - Capture, Storage, Sequestration OR Disposal OF Greenhouse Gases [GHG] 1

Y02A - Technologies FOR Adaptation TO Climate Change 1

C10K - Purifying OR Modifying THE Chemical Composition OF Combustible Gases Containing Carbon Monoxide 1

C10B - Destructive Distillation OF Carbonaceous Materials FOR Production OF GAS, Coke, TAR, OR Similar Materials 1

C01B - Non-metallic ELEMENTS; Compounds THEREOF; ; Metalloids OR Compounds Thereof NOT Covered BY Subclass C01c 1

B04C - Apparatus Using Free Vortex Flow, e.g. Cyclones 1

Top 11 of 11 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

Shanghai Huachang Environmental Protection Co., Ltd.'s patent record in context - here's where to go next.

Shanghai Huachang Environmental Protection Co., Ltd.'s lead technology class is B01D (Separation), 57.1% of its portfolio - see every assignee active in that class. Explore B01D
Ranked #37,437 of 49,997 tracked assignees by patent volume - see the full leaderboard. See the ranking
Compare Shanghai Huachang Environmental Protection Co., Ltd. against Serenity Data Security, LLC, an assignee filing at a similar volume. Compare portfolios
Innovation Score of 44.8/100 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.