Where does Porvair Filtration Group Limited rank among US patent assignees?

According to USPTO PatentsView (2015–2025 granted utility patents), Porvair Filtration Group Limited ranks #37,031 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 Porvair Filtration Group Limited hold?

Porvair Filtration Group Limited holds 7 US utility patents granted between 2015 and 2024, spanning 7 technology areas.

What is Porvair Filtration Group Limited's Innovation Score?

Porvair Filtration Group Limited has an Innovation Score of 28.5 out of 100 (28th percentile of the corpus). This composite metric weighs portfolio volume (40%), grant velocity (20%), technology breadth (25%), and claim depth (15%).

What technology areas does Porvair Filtration Group Limited focus on?

Porvair Filtration Group Limited's top technology area is B01D (Separation) with 5 patents, ranking #948 of 3,536 assignees active in that subclass. Grants appear in 7 CPC subclasses total.

Is Porvair Filtration Group Limited's patent grant rate increasing or decreasing?

Porvair Filtration Group Limited'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 Porvair Filtration Group Limited's patents?

Porvair Filtration Group Limited's patents average 16.3 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 Porvair Filtration Group Limited 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

Porvair Filtration Group Limited

USPTO PatentsView assignee record - 7 granted patents across 7 technology areas, recorded in grant years 2015–2024. 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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Explore the portfolio See the ranking

The verdict

According to USPTO PatentsView, Porvair ranks #37,031 of 49,997 tracked US assignees by granted-patent volume, with 7 patents across 7 technology areas.

#37,031
of 49,997 US assignees by volume: 28th percentile
by Innovation Score (28.5/100): 16.3
avg claims per patent: -25%
grant velocity, last 5 yrs

USPTO PatentsView assignee plate

Corpus R37031 · Foreign Corporation #37,031 · 7 grants

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

GRANTS-MICRO 7 grants
MID-PACK #37,031/49,997
PHOTO-FINISH PolySign
CPC-NARROW B01D · 7 areas
INNOV-THIN 28.5/100
CLAIMS-RICH 16.3 claims/avg
TYPE-FRNCORP Foreign Corp
VEL-DOWN -25% vel
BOOK-FULL 10/10 fields

Nearest grant-volume peer: PolySign, 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 Porvair’s 28.5 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 (25%) Velocity 2.2 pts (8%) Breadth 9.4 pts (33%) Claim depth 9.8 pts (34%)

Qualcomm Incorporated · highest

85
Porvair Filtration… · this assignee

29
3D Lighting… · lowest

7

What this shows Porvair's Innovation Score is 28.5/100 (28th 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.

Does more volume mean deeper claims for Porvair?

Each dot is one of Porvair’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). Porvair’s own 16.3 claims/patent is at or below the 16.4 median for these volume peers. Volume here does not track with deeper claims; several lower-volume peers claim more thoroughly per patent.

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

Where Porvair's grants concentrate

Porvair Filtration Group Limited is a focused PatentsView assignee: 7 CPC subclasses with 71.4% of grants classified under B01D (Separation). By volume, Porvair sits between PolySign, Inc. and Power Management Holdings (U.S.), Inc..

Porvair's three-year grant acceleration

Porvair Filtration Group Limited shows 1 grants in 2022–2024 against only 3 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.

Polysign

7
Polytainers

7
Polytech A/S

7
Pontus Subsea Con…

7
Positec Technolog…

7
Potenza Therapeut…

7
Potter Electric S…

7
Power Management…

7
Porvair Filtratio… ◀

7

What this shows Porvair holds 7 patents at rank #37,043, shown against the 8 assignees closest to it in grant volume rather than the industry's largest filers.

Companies ranked near Porvair

By rank, the assignees closest to #37,043 in granted patent volume.

Leaders in B01D (Separation)

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

Porvair's Innovation Score vs. every tracked assignee

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

29 28th percentile higher than 28% 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 · 2015–2024

Grants by year

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

View data table

Porvair Filtration Group Limited patent grants by year, 2015–2025
Year	Patents Granted	Share of Period
2015	1	14.3%
2016	1	14.3%
2018	1	14.3%
2019	1	14.3%
2020	1	14.3%
2021	1	14.3%
2024	1	14.3%

Which technologies does Porvair Filtration Group Limited patent most?

B01D - Separation 5

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

B01L - Chemical OR Physical Laboratory Apparatus FOR General USE 2

G01N - Investigating OR Analysing Materials BY Determining Their Chemical OR Physical Properties 2

C12Q - Measuring OR Testing Processes Involving Enzymes, Nucleic Acids OR Microorganisms ; Compositions OR Test Papers THEREFOR; Processes OF Preparing Such COMPOSITIONS; Condition-responsive Control IN Microbiological OR Enzymological Processes 2

A23L - Foods, Foodstuffs OR Non-alcoholic Beverages, NOT Otherwise Provided FOR; Preparation OR Treatment Thereof 1

C12H - Pasteurisation, Sterilisation, Preservation, Purification, Clarification OR Ageing OF Alcoholic BEVERAGES; Methods FOR Altering THE Alcohol Content OF Fermented Solutions OR Alcoholic Beverages 1

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

Porvair Filtration Group Limited's patent record in context - here's where to go next.

Porvair Filtration Group Limited's lead technology class is B01D (Separation), 71.4% of its portfolio - see every assignee active in that class. Explore B01D
Ranked #37,031 of 49,997 tracked assignees by patent volume - see the full leaderboard. See the ranking
Compare Porvair Filtration Group Limited against PolySign, Inc., an assignee filing at a similar volume. Compare portfolios
Innovation Score of 28.5/100 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.