Where does Heat Recovery Solutions Limited rank among US patent assignees?

According to USPTO PatentsView (2015–2025 granted utility patents), Heat Recovery Solutions Limited ranks #40,666 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 Heat Recovery Solutions Limited hold?

Heat Recovery Solutions Limited holds 6 US utility patents granted between 2015 and 2020, spanning 5 technology areas.

What is Heat Recovery Solutions Limited's Innovation Score?

Heat Recovery Solutions Limited has an Innovation Score of 23.6 out of 100 (13th percentile of the corpus). This composite metric weighs portfolio volume (40%), grant velocity (20%), technology breadth (25%), and claim depth (15%).

Is Heat Recovery Solutions Limited's patent grant rate increasing or decreasing?

Heat Recovery Solutions Limited's recent grant velocity is -80% 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 Heat Recovery Solutions Limited's patents?

Heat Recovery Solutions Limited's patents average 15.0 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 Heat Recovery Solutions 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

Heat Recovery Solutions Limited

Q: What technology areas does Heat Recovery Solutions Limited focus on?

Heat Recovery Solutions Limited's top technology area is F28D (Heat-exchange Apparatus, NOT Provided FOR IN Another Subclass, IN Which THE Heat-exchange Media DO NOT Come Into Direct Contact) with 5 patents, ranking #158 of 801 assignees active in that subclass. Grants appear in 5 CPC subclasses total.

USPTO PatentsView assignee record - 6 granted patents across 5 technology areas, recorded in grant years 2015–2020. 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: F28D (Heat-exchange Apparatus, NOT Provided FOR IN Another Subclass, IN Which THE Heat-exchange Media DO NOT Come Into Direct Contact).

Compiled by PlainPatent · May 15, 2026

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The verdict

According to USPTO PatentsView, Heat ranks #40,666 of 49,997 tracked US assignees by granted-patent volume, with 6 patents across 5 technology areas.

#40,666
of 49,997 US assignees by volume: 13th percentile
by Innovation Score (23.6/100): 15.0
avg claims per patent: -80%
grant velocity, last 5 yrs

USPTO PatentsView assignee plate

Corpus R40666 · Foreign Corporation #40,666 · 6 grants

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

GRANTS-MICRO 6 grants
LOWER-Q #40,666/49,997
PHOTO-FINISH Healthy Humming
CPC-NARROW F28D · 5 areas
INNOV-THIN 23.6/100
CLAIMS-RICH 15.0 claims/avg
TYPE-FRNCORP Foreign Corp
VEL-DROP -80% vel
BOOK-FULL 10/10 fields

Nearest grant-volume peer: Healthy Humming, 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 Heat’s 23.6 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 6.7 pts (28%) Velocity 0.0 pts (0%) Breadth 7.9 pts (33%) Claim depth 9.0 pts (38%)

Qualcomm Incorporated · highest

85
Heat Recovery… · this assignee

24
3D Lighting… · lowest

7

What this shows Heat's Innovation Score is 23.6/100 (13th 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 Heat?

Each dot is one of Heat’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). Heat’s own 15.0 claims/patent is ABOVE the 9.5 median for these volume peers. More thorough claims than most filers at this scale, not just more of them.

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

Where Heat's grants concentrate

Heat Recovery Solutions Limited is a focused PatentsView assignee: 5 CPC subclasses with 83.3% of grants classified under F28D (Heat-exchange Apparatus, NOT Provided FOR IN Another Subclass, IN Which THE Heat-exchange Media DO NOT Come Into Direct Contact). Peak complete grant year is 2015 (2 grants) versus a trough of 1 in 2017. By volume, Heat sits between Healthy Humming, LLC and Heineken UK Limited.

Healthy Humming

6
Heartfelt

6
Hearth Products C…

6
Hearthmark

6
Heatgenie

6
Hefei Tuwa Techno…

6
Hefei Wisdom Brid…

6
Heineken UK

6
Heat Recovery Sol… ◀

6

What this shows Heat holds 6 patents at rank #40,729, shown against the 8 assignees closest to it in grant volume rather than the industry's largest filers.

Companies ranked near Heat

By rank, the assignees closest to #40,729 in granted patent volume.

Leaders in F28D (Heat-exchange Apparatus)

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

Heat's Innovation Score vs. every tracked assignee

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

24 13th percentile higher than 13% 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 · 2015–2020

Grants by year

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

View data table

Heat Recovery Solutions Limited patent grants by year, 2015–2025
Year	Patents Granted	Share of Period
2015	2	33.3%
2017	1	16.7%
2019	2	33.3%
2020	1	16.7%

Which technologies does Heat Recovery Solutions Limited patent most?

F28D - Heat-exchange Apparatus, NOT Provided FOR IN Another Subclass, IN Which THE Heat-exchange Media DO NOT Come Into Direct Contact 5

F01N - Gas-flow Silencers OR Exhaust Apparatus FOR Machines OR Engines IN GENERAL; Gas-flow Silencers OR Exhaust Apparatus FOR Internal-combustion Engines 3

F28F - Details OF Heat-exchange AND Heat-transfer Apparatus, OF General Application 2

F02C - Gas-turbine PLANTS; AIR Intakes FOR Jet-propulsion PLANTS; Controlling Fuel Supply IN Air-breathing Jet-propulsion Plants 2

F01K - Steam Engine PLANTS; Steam ACCUMULATORS; Engine Plants NOT Otherwise Provided FOR; Engines Using Special Working Fluids OR Cycles 1

Top 5 of 5 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

Heat Recovery Solutions Limited's patent record in context - here's where to go next.

Heat Recovery Solutions Limited's lead technology class is F28D (Heat-exchange Apparatus, NOT Provided FOR IN Another Subclass, IN Which THE Heat-exchange Media DO NOT Come Into Direct Contact), 83.3% of its portfolio - see every assignee active in that class. Explore F28D
Ranked #40,666 of 49,997 tracked assignees by patent volume - see the full leaderboard. See the ranking
Compare Heat Recovery Solutions Limited against Healthy Humming, LLC, an assignee filing at a similar volume. Compare portfolios
Innovation Score of 23.6/100 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.