Where does Pangang Group Panzhihua Iron & Steel Research Institute Co., Ltd. rank among US patent assignees?

According to USPTO PatentsView (2015–2025 granted utility patents), Pangang Group Panzhihua Iron & Steel Research Institute Co., Ltd. ranks #21,583 of 49,997 assignees by granted-patent volume, the same sort as the companies listing and top-holders ranking. See /methodology/#corpus-placement.

Is Pangang Group Panzhihua Iron & Steel Research Institute Co., Ltd.'s patent grant rate increasing or decreasing?

Pangang Group Panzhihua Iron & Steel Research Institute Co., Ltd.'s recent grant velocity is -67% 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 Pangang Group Panzhihua Iron & Steel Research Institute Co., Ltd.'s patents?

Pangang Group Panzhihua Iron & Steel Research Institute Co., Ltd.'s patents average 10.5 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

Pangang Group Panzhihua Iron & Steel Research Institute Co., Ltd.

Q: How is the Pangang Group Panzhihua Iron & Steel Research Institute 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 - 13 granted patents across 14 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: C21D (Modifying THE Physical Structure OF Ferrous METALS; General Devices FOR Heat Treatment OF Ferrous OR Non-ferrous Metals OR ALLOYS; Making Metal Malleable, e.g. BY Decarburisation OR Tempering).

Compiled by PlainPatent · May 15, 2026

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The verdict

According to USPTO PatentsView, Pangang ranks #21,583 of 49,997 tracked US assignees by granted-patent volume, with 13 patents across 14 technology areas.

#21,583
of 49,997 US assignees by volume: Top 40%
by Innovation Score (38.6/100): 10.5
avg claims per patent: -67%
grant velocity, last 5 yrs

USPTO PatentsView assignee plate

Corpus R21583 · Foreign Corporation #21,583 · 13 grants

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

GRANTS-MICRO 13 grants
MID-PACK #21,583/49,997
PHOTO-FINISH Oxefit
CPC-FOCUS C21D · 14 areas
INNOV-THIN 38.6/100
CLAIMS-PAR 10.5 claims/avg
TYPE-FRNCORP Foreign Corp
VEL-DROP -67% vel
BOOK-FULL 10/10 fields

Nearest grant-volume peer: Oxefit, Inc. (±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 Pangang’s 38.6 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 9.1 pts (24%) Velocity 10.0 pts (26%) Breadth 13.2 pts (34%) Claim depth 6.3 pts (16%)

Qualcomm Incorporated · highest

85
Pangang Group… · this assignee

39
3D Lighting… · lowest

7

What this shows Pangang's Innovation Score is 38.6/100 (top 40% 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 Pangang?

Each dot is one of Pangang’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). Pangang’s own 10.5 claims/patent is at or below the 16.9 median for these volume peers. Volume here does not track with deeper claims; several lower-volume peers claim more thoroughly per patent.

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

Where Pangang's grants concentrate

Pangang Group Panzhihua Iron & Steel Research Institute Co., Ltd. is a focused PatentsView assignee: 14 CPC subclasses with 69.2% of grants classified under C21D (Modifying THE Physical Structure OF Ferrous METALS; General Devices FOR Heat Treatment OF Ferrous OR Non-ferrous Metals OR ALLOYS; Making Metal Malleable, e.g. BY Decarburisation OR Tempering). Peak complete grant year is 2015 (2 grants) versus a trough of 1 in 2018. By volume, Pangang sits between Oxefit, Inc. and PC Matic, Inc..

Pangang's three-year grant acceleration

Pangang Group Panzhihua Iron & Steel Research Institute Co., Ltd. shows 3 grants in 2022–2024 against only 2 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.

Oxefit

13
P V Flood Control

13
Paha Designs

13
Paloma

13
Park WAY

13
Parker Hannifin M…

13
Pathak Holdings

13
PC Matic

13
Pangang Group Pan… ◀

13

What this shows Pangang holds 13 patents at rank #21,577, shown against the 8 assignees closest to it in grant volume rather than the industry's largest filers.

Companies ranked near Pangang

By rank, the assignees closest to #21,577 in granted patent volume.

Leaders in C21D (Modifying THE Physical Structure OF Ferrous Metals)

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

Pangang's Innovation Score vs. every tracked assignee

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

39 Top 40% higher than 60% 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

Pangang Group Panzhihua Iron & Steel Research Institute Co., Ltd. patent grants by year, 2015–2025
Year	Patents Granted	Share of Period
2015	2	15.4%
2016	2	15.4%
2017	2	15.4%
2018	1	7.7%
2019	2	15.4%
2022	1	7.7%
2023	1	7.7%
2024	1	7.7%
2025partial year	1	7.7%

Which technologies does Pangang Group Panzhihua Iron & Steel Research Institute Co., Ltd. patent most?

C21D - Modifying THE Physical Structure OF Ferrous METALS; General Devices FOR Heat Treatment OF Ferrous OR Non-ferrous Metals OR ALLOYS; Making Metal Malleable, e.g. BY Decarburisation OR Tempering 9

C22C - Alloys 6

Y10T - Technical Subjects Covered BY Former US Classification 2

E01B - Permanent WAY; Permanent-way TOOLS; Machines FOR Making Railways OF ALL Kinds 2

B05D - Processes FOR Applying Fluent Materials TO Surfaces, IN General 1

C09D - Coating Compositions, e.g. Paints, Varnishes OR LACQUERS; Filling PASTES; Chemical Paint OR INK REMOVERS; INKS; Correcting FLUIDS; WOODSTAINS; Pastes OR Solids FOR Colouring OR PRINTING; USE OF Materials Therefor 1

C23C - Coating Metallic MATERIAL; Coating Material With Metallic MATERIAL; Surface Treatment OF Metallic Material BY Diffusion Into THE Surface, BY Chemical Conversion OR SUBSTITUTION; Coating BY Vacuum Evaporation, BY Sputtering, BY ION Implantation OR BY Chemical Vapour Deposition, IN General 1

F27D - Details OR Accessories OF Furnaces, Kilns, Ovens OR Retorts, IN SO FAR AS They ARE OF Kinds Occurring IN More Than ONE Kind OF Furnace 1

F27B - Furnaces, Kilns, Ovens OR Retorts IN GENERAL; Open Sintering OR Like Apparatus 1

C21B - Manufacture OF Iron OR Steel 1

G01N - Investigating OR Analysing Materials BY Determining Their Chemical OR Physical Properties 1

B01D - Separation 1

C25C - Processes FOR THE Electrolytic Production, Recovery OR Refining OF METALS; Apparatus Therefor 1

C21C - Processing OF Pig-iron, e.g. Refining, Manufacture OF Wrought-iron OR STEEL; Treatment IN Molten State OF Ferrous Alloys 1

Top 14 of 14 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

Pangang Group Panzhihua Iron & Steel Research Institute Co., Ltd.'s patent record in context - here's where to go next.

Pangang Group Panzhihua Iron & Steel Research Institute Co., Ltd.'s lead technology class is C21D (Modifying THE Physical Structure OF Ferrous METALS; General Devices FOR Heat Treatment OF Ferrous OR Non-ferrous Metals OR ALLOYS; Making Metal Malleable, e.g. BY Decarburisation OR Tempering), 69.2% of its portfolio - see every assignee active in that class. Explore C21D
Ranked #21,583 of 49,997 tracked assignees by patent volume - see the full leaderboard. See the ranking
Compare Pangang Group Panzhihua Iron & Steel Research Institute Co., Ltd. against Oxefit, Inc., an assignee filing at a similar volume. Compare portfolios
Innovation Score of 38.6/100 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.