PlainPatent
USPTO 2015–2025 USPTO PatentsView Foreign Corporation

Quantex Patents Limited

USPTO PatentsView assignee record - 10 granted patents across 7 technology areas, recorded in grant years 2015–2021. 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: F04C (Rotary-piston, OR Oscillating-piston, Positive-displacement Machines FOR Liquids ; Rotary-piston, OR Oscillating-piston, Positive-displacement Pumps).

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The verdict

According to USPTO PatentsView, Quantex ranks #27,215 of 49,997 tracked US assignees by granted-patent volume, with 10 patents across 7 technology areas.

#27,215
of 49,997 US assignees by volume
30th percentile
by Innovation Score (29.3/100)
19.5
avg claims per patent
-89%
grant velocity, last 5 yrs

USPTO PatentsView assignee plate

Corpus R27215 · Foreign Corporation #27,215 · 10 grants

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

  • GRANTS-MICRO 10 grants
  • MID-PACK #27,215/49,997
  • PHOTO-FINISH Qi Ding Technology…
  • CPC-NARROW F04C · 7 areas
  • INNOV-THIN 29.3/100
  • CLAIMS-RICH 19.5 claims/avg
  • TYPE-FRNCORP Foreign Corp
  • VEL-DROP -89% vel
  • BOOK-FULL 10/10 fields

Nearest grant-volume peer: Qi Ding Technology Qinhuangdao Co, Ltd. (±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 Quantex’s 29.3 Innovation Score adds up

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

Innovation-score neighbourhood around Quantex

Lowest and highest poles plus nearest Innovation Score peers, not a full corpus board reprint.

score

What this shows Quantex's Innovation Score is 29.3/100 (30th percentile 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.

Source USPTO PatentsView, PlainPatent Innovation Score As of 2015–2025

Does more volume mean deeper claims for Quantex?

Each dot is one of Quantex’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). Quantex’s own 19.5 claims/patent is ABOVE the 16.6 median for these volume peers. More thorough claims than most filers at this scale, not just more of them.

Quantex vs its 8 nearest volume peers: granted patents vs average claims per patent. Source: USPTO PatentsView. 2×2 strategic matrix plotting 9 entities by Granted patents (volume) (X) and Avg claims / patent (Y), with a crosshair dividing the plot into four quadrants. Volume + depthSelective & thoroughVolume over depthLean filer 9.99.91010.1 1015202530 Granted patents (volume) Avg claims / patent Qosound, Inc. - 10, 13.3QosoundQuadriga Biosciences, Inc. - 10, 21.5Quadriga Bioscien…Qualipac - 10, 15.9QualipacQuantalrf AG - 10, 19.7QuantalrfQuanticel Pharmaceuticals, Inc. - 10, 26.7Quanticel Pharmac…Quantum Design International, Inc. - 10, 16.6Quantum Design In…Quixant PLC - 10, 17.3QuixantQi Ding Technology Qinhuangdao Co, Ltd. - 10, 10.9Qi Ding Technolog…Quantex Patents Limited - 10, 19.5Quantex Patents
Quantex vs its 8 nearest volume peers: granted patents vs average claims per patent. Source: USPTO PatentsView.

Where Quantex's grants concentrate

Quantex Patents Limited is a focused PatentsView assignee: 7 CPC subclasses with 90% of grants classified under F04C (Rotary-piston, OR Oscillating-piston, Positive-displacement Machines FOR Liquids ; Rotary-piston, OR Oscillating-piston, Positive-displacement Pumps). Peak complete grant year is 2017 (3 grants) versus a trough of 1 in 2015. By volume, Quantex sits between Qosound, Inc. and Qi Ding Technology Qinhuangdao Co, Ltd..

Who files at Quantex's volume?

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

patents

What this shows Quantex holds 10 patents at rank #27,200, 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 Quantex

By rank, the assignees closest to #27,200 in granted patent volume.

Leaders in F04C (Rotary-piston)

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

Quantex's Innovation Score vs. every tracked assignee

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

29 30th percentile higher than 30% of 49,997 US assignees

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

0.511.522.533.5 20152017201820192021 1
USPTO utility patent grants by year · 2015–2021

Grants by year

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

View data table
Quantex Patents Limited patent grants by year, 2015–2025
Year Patents Granted Share of Period
2015 1 10.0%
2017 3 30.0%
2018 2 20.0%
2019 3 30.0%
2021 1 10.0%

Which technologies does Quantex Patents Limited patent most?

Top 7 of 7 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

Quantex Patents Limited's patent record in context - here's where to go next.

  • Quantex Patents Limited's lead technology class is F04C (Rotary-piston, OR Oscillating-piston, Positive-displacement Machines FOR Liquids ; Rotary-piston, OR Oscillating-piston, Positive-displacement Pumps), 90% of its portfolio - see every assignee active in that class. Explore F04C
  • Ranked #27,215 of 49,997 tracked assignees by patent volume - see the full leaderboard. See the ranking
  • Compare Quantex Patents Limited against Qosound, Inc., an assignee filing at a similar volume. Compare portfolios
  • Innovation Score of 29.3/100 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

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.