Where does CalPortland Company rank among US patent assignees?

According to USPTO PatentsView (2015–2025 granted utility patents), CalPortland Company ranks #39,293 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 CalPortland Company hold?

CalPortland Company holds 6 US utility patents granted between 2017 and 2020, spanning 12 technology areas.

What is CalPortland Company's Innovation Score?

CalPortland Company has an Innovation Score of 25.0 out of 100 (16th percentile of the corpus). This composite metric weighs portfolio volume (40%), grant velocity (20%), technology breadth (25%), and claim depth (15%).

Is CalPortland Company's patent grant rate increasing or decreasing?

CalPortland Company's recent grant velocity is -50% 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 CalPortland Company's patents?

CalPortland Company's patents average 10.0 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 CalPortland Company 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 US Corporation

CalPortland Company

Q: What technology areas does CalPortland Company focus on?

CalPortland Company's top technology area is 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) with 3 patents. Grants appear in 12 CPC subclasses total.

USPTO PatentsView assignee record - 6 granted patents across 12 technology areas, recorded in grant years 2017–2020. 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: 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).

Compiled by PlainPatent · May 15, 2026

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The verdict

According to USPTO PatentsView, Calportland ranks #39,293 of 49,997 tracked US assignees by granted-patent volume, with 6 patents across 12 technology areas.

#39,293
of 49,997 US assignees by volume: 16th percentile
by Innovation Score (25.0/100): 10.0
avg claims per patent: -50%
grant velocity, last 5 yrs

USPTO PatentsView assignee plate

Corpus R39293 · US Corporation #39,293 · 6 grants

GRANTS-MICRO · LOWER-Q · PHOTO-FINISH · CPC-FOCUS · INNOV-THIN · CLAIMS-PAR · TYPE-USCORP · VEL-DROP · BOOK-FULL

GRANTS-MICRO 6 grants
LOWER-Q #39,293/49,997
PHOTO-FINISH California Exotic…
CPC-FOCUS F27D · 12 areas
INNOV-THIN 25.0/100
CLAIMS-PAR 10.0 claims/avg
TYPE-USCORP US Corporation
VEL-DROP -50% vel
BOOK-FULL 10/10 fields

Nearest grant-volume peer: California Exotic Novelties 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.

Qualcomm Incorporated · highest

85
CalPortland · this assignee

25
3D Lighting… · lowest

7

What this shows Calportland's Innovation Score is 25.0/100 (16th 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.

Where Calportland's grants concentrate

CalPortland Company is a focused PatentsView assignee: 12 CPC subclasses with 50% of grants classified under 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). Peak complete grant year is 2017 (2 grants) versus a trough of 1 in 2018. By volume, Calportland sits between Cuttway Products Co., Ltd. and Cambridge Heatwear Limited.

Cuttway Products

6
Cyanagen S r l

6
Cytac Technology

6
Cap Biomaterials

6
California Exotic…

6
Caloris Engineeri…

6
Cambridge Blockch…

6
Cambridge Heatwear

6
Calportland ◀

6

What this shows CalPortland holds 6 patents at rank #39,482, shown against the 8 assignees closest to it in grant volume rather than the industry's largest filers.

Companies ranked near CalPortland

By rank, the assignees closest to #39,482 in granted patent volume.

Leaders in F27D (Details OR Accessories OF Furnaces)

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

Calportland's Innovation Score vs. every tracked assignee

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

25 16th percentile higher than 16% 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 · 2017–2020

Grants by year

Teal-shaded recent years (2020–present) versus the 2017–2019 baseline. Full figures in the table below.

View data table

CalPortland Company patent grants by year, 2015–2025
Year	Patents Granted	Share of Period
2017	2	33.3%
2018	1	16.7%
2019	1	16.7%
2020	2	33.3%

Which technologies does CalPortland Company patent most?

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 3

C04B - Lime, MAGNESIA; SLAG; CEMENTS; Compositions Thereof, e.g. Mortars, Concrete OR Like Building MATERIALS; Artificial Stone ; Ceramics ; REFRACTORIES; Treatment OF Natural Stone 3

F27B - Furnaces, Kilns, Ovens OR Retorts IN GENERAL; Open Sintering OR Like Apparatus 3

Y02P - Climate Change Mitigation Technologies IN THE Production OR Processing OF Goods 3

B01D - Separation 3

B01F - Mixing, e.g. Dissolving, Emulsifying OR Dispersing 1

B62D - Motor VEHICLES; Trailers 1

B28C - Preparing CLAY; Producing Mixtures Containing Clay OR Cementitious Material, e.g. Plaster 1

B60R - Vehicles, Vehicle Fittings, OR Vehicle Parts, NOT Otherwise Provided FOR 1

B60Y - Indexing Scheme Relating TO Aspects Cross-cutting Vehicle Technology 1

B60K - Arrangement OR Mounting OF Propulsion Units OR OF Transmissions IN VEHICLES; Arrangement OR Mounting OF Plural Diverse Prime-movers IN VEHICLES; Auxiliary Drives FOR VEHICLES; Instrumentation OR Dashboards FOR VEHICLES; Arrangements IN Connection With Cooling, AIR Intake, GAS Exhaust OR Fuel Supply 1

B60P - Vehicles Adapted FOR Load Transportation OR TO Transport, TO Carry, OR TO Comprise Special Loads OR Objects 1

Top 12 of 12 technology areas

Where it ranks

Overall rank by patents

#39,293

of 49,997 tracked assignees

Innovation Score

25.0 out of 100

View all rankings →

Data Source

USPTO PatentsView, US granted patents 2015–2025

How is Innovation Score calculated?

What to do with this data

CalPortland Company's patent record in context - here's where to go next.

CalPortland Company's lead technology class is 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), 50% of its portfolio - see every assignee active in that class. Explore F27D
Ranked #39,293 of 49,997 tracked assignees by patent volume - see the full leaderboard. See the ranking
Compare CalPortland Company against Cuttway Products Co., Ltd., an assignee filing at a similar volume. Compare portfolios
Innovation Score of 25.0/100 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.