PlainPatent
USPTO 2015–2025 USPTO PatentsView Foreign Corporation

Nanjing University

USPTO PatentsView assignee record - 255 granted patents across 142 technology areas, active 2015–2025. Filing-trend and competitive-moat analysis cross-referenced to USPTO Patent Public Search. Primary class: C02F (TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE).

Explore the portfolio See the ranking
255
Total patents granted
142
CPC technology areas
9.0
Avg claims per patent
+115%
5-year filing velocity

The verdict

Nanjing holds 255 US patents across 142 technology areas, rank #1,621 of 50,000 tracked assignees.

#1,621
of 50,000 US assignees by volume
Top 2%
by Innovation Score (63.3/100)
9.0
avg claims per patent
+115%
filing velocity, last 5 yrs

Portfolio overview

Nanjing University has been granted 255 US utility patents between 2015 and 2025, placing Nanjing University at rank #1,621 across all assignees tracked by PlainPatent. This portfolio spans 142 distinct Cooperative Patent Classification (CPC) subclasses, averaging 9.0 claims per patent with primary concentration in C02F (TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE). As a Foreign Corporation, Nanjing University is one of the broader-portfolio assignees in the PatentsView dataset. By volume, Nanjing sits between Biomerieux, Inc. (255 patents, rank #1,617) and Aruba Networks, Inc. (253 patents, rank #1,625) - the closest US assignees by grant volume. The composite Innovation Score of 63.3/100 blends portfolio volume, filing velocity, technology breadth, and claim depth into a single comparable measure drawn directly from USPTO PatentsView records.

Filing cadence tells the strategic story. Between 2020 and 2025 the company received 174 grants, compared with 81 in the 2015–2019 window, a +115% shift in five-year velocity. An acceleration of this magnitude signals aggressive R&D investment and expanding technical ambition. The Foreign Corporation classification further shapes interpretation, since corporate, government, and individual filers pursue patents for materially different reasons.

Claim depth and technology breadth together indicate competitive posture. Nanjing University's 9.0 average claims per patent suggests focused, narrowly drawn claims typical of single-invention filings, while a diversified footprint across 100+ CPC subclasses spreads risk across many technology fronts. Combined with portfolio volume, these signals let analysts, investors, and licensing professionals benchmark Nanjing University against peers pursuing similar technology classes.

Who files at Nanjing's volume?

Granted US patents 2015–2025 versus its nearest-ranked assignees by volume, this company marked ◀

patents

What this shows Nanjing holds 255 patents at rank #1,621, shown against the 8 assignees closest to it in grant volume rather than the industry's largest filers.

Source USPTO PatentsView, granted utility patents As of 2015–2025

Companies ranked near Nanjing

By rank, the assignees closest to #1,621 in granted patent volume.

Leaders in C02F (Treatment OF Water)

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

Nanjing's Innovation Score vs. every tracked assignee

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

63 Top 2% higher than 98% of 50,000 US assignees

0–10: 687 US assignees (1%). Below this entry. 10–20: 2,527 US assignees (5%). Below this entry. 20–30: 13,162 US assignees (26%). Below this entry. 30–40: 15,294 US assignees (31%). Below this entry. 40–50: 11,491 US assignees (23%). Below this entry. 50–60: 5,058 US assignees (10%). Below this entry. 60–70: 1,537 US assignees (3%). This entry sits in this band. 70–80: 234 US assignees (0%). Above this entry. 80–90: 10 US assignees (0%). Above this entry. 90–100: 0 US assignees (0%). Above this entry. This assignee 0 100 every tracked assignee, bucketed by value

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

1020304050 20152016201720182019202020212022202320242025 34
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
Nanjing University patent grants by year, 2015–2025
Year Patents Granted Share of Period
2015 15 5.9%
2016 14 5.5%
2017 17 6.7%
2018 19 7.5%
2019 16 6.3%
2020 18 7.1%
2021 17 6.7%
2022 28 11.0%
2023 33 12.9%
2024 44 17.3%
2025 34 13.3%

Which technologies does Nanjing University patent most?

Top 15 of 142 technology areas

Patent Moat Analysis

Portfolio Volume Moderate
Tech Breadth Diversified
Claim Depth Simple
Velocity Accelerating

Where it ranks

Overall rank by patents

#1,621

Across all tracked assignees

Innovation Score

63.3 out of 100

View all rankings →

Data Source

USPTO PatentsView, US granted patents 2015–2025

How is Innovation Score calculated?

Frequently Asked Questions

How many patents does Nanjing University hold?
Nanjing University holds 255 US granted patents filed between 2015 and 2025, spanning 142 technology areas.
What is Nanjing University's Innovation Score?
Nanjing University has an Innovation Score of 63.3 out of 100. This composite metric weighs portfolio volume (40%), filing velocity (20%), technology breadth (25%), and claim depth (15%).
What technology areas does Nanjing University focus on?
Nanjing University's top technology area is C02F (TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE) with 75 patents. The company has filed patents in 142 CPC subclasses total.
Is Nanjing University's patent filing rate increasing or decreasing?
Nanjing University's recent filing velocity is +115% compared to the prior five-year period. This indicates accelerating innovation.
What does claim depth mean for Nanjing University's patents?
Nanjing University's patents average 9.0 claims each. This is relatively simple claim structure, typical for focused inventions.
How is the Nanjing University 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.

How to use this portfolio

Nanjing's 255 grants land it in the top 2% by Innovation Score, but volume alone doesn't tell you where the strength sits.

  • Read that count against the largest US assignees before treating it as dominance - Nanjing ranks #1,621 of 50,000. Top 50 holders
  • Most of this portfolio concentrates in C02F - see who else leads that technology area. C02F leaders
  • Check what the four-part Innovation Score actually rewards before comparing it to another company. How the score works

Patent counts and the Innovation Score measure patenting activity, not commercial success or the legal strength of any patent. Many patents are filed defensively. Verify the status of an individual patent against official USPTO records.

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

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

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.