Where does Westlake Longview Corporation rank among US patent assignees?

According to USPTO PatentsView (2015–2025 granted utility patents), Westlake Longview Corporation ranks #33,886 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 Westlake Longview Corporation hold?

Westlake Longview Corporation holds 8 US utility patents granted between 2018 and 2025, spanning 8 technology areas.

What is Westlake Longview Corporation's Innovation Score?

Westlake Longview Corporation has an Innovation Score of 31.1 out of 100 (36th percentile of the corpus). This composite metric weighs portfolio volume (40%), grant velocity (20%), technology breadth (25%), and claim depth (15%).

Is Westlake Longview Corporation's patent grant rate increasing or decreasing?

Westlake Longview Corporation's recent grant velocity is +150% compared to the prior five-year period (grant years, not application filing dates). This indicates accelerating grant output.

What does claim depth mean for Westlake Longview Corporation's patents?

Westlake Longview Corporation's patents average 16.9 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 Westlake Longview Corporation 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

Westlake Longview Corporation

Q: What technology areas does Westlake Longview Corporation focus on?

Westlake Longview Corporation's top technology area is B29C (Shaping OR Joining OF PLASTICS; Shaping OF Material IN A Plastic State, NOT Otherwise Provided FOR; After-treatment OF THE Shaped Products, e.g. Repairing) with 4 patents, ranking #1,358 of 4,378 assignees active in that subclass. Grants appear in 8 CPC subclasses total.

USPTO PatentsView assignee record - 8 granted patents across 8 technology areas, recorded in grant years 2018–2025. 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: B29C (Shaping OR Joining OF PLASTICS; Shaping OF Material IN A Plastic State, NOT Otherwise Provided FOR; After-treatment OF THE Shaped Products, e.g. Repairing).

Compiled by PlainPatent · May 15, 2026

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The verdict

According to USPTO PatentsView, Westlake ranks #33,886 of 49,997 tracked US assignees by granted-patent volume, with 8 patents across 8 technology areas.

#33,886
of 49,997 US assignees by volume: 36th percentile
by Innovation Score (31.1/100): 16.9
avg claims per patent: +150%
grant velocity, last 5 yrs

USPTO PatentsView assignee plate

Corpus R33886 · US Corporation #33,886 · 8 grants

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

GRANTS-MICRO 8 grants
MID-PACK #33,886/49,997
PHOTO-FINISH Weiler Engineering
CPC-NARROW B29C · 8 areas
INNOV-THIN 31.1/100
CLAIMS-RICH 16.9 claims/avg
TYPE-USCORP US Corporation
VEL-SURGE +150% vel
BOOK-FULL 10/10 fields

Nearest grant-volume peer: Weiler Engineering 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 Westlake’s 31.1 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 7.6 pts (25%) Velocity 3.3 pts (11%) Breadth 10.0 pts (32%) Claim depth 10.1 pts (33%)

Qualcomm Incorporated · highest

85
Westlake Longview · this assignee

31
3D Lighting… · lowest

7

What this shows Westlake's Innovation Score is 31.1/100 (36th 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 Westlake?

Each dot is one of Westlake’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). Westlake’s own 16.9 claims/patent is ABOVE the 11.6 median for these volume peers. More thorough claims than most filers at this scale, not just more of them.

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

Where Westlake's grants concentrate

Westlake Longview Corporation is a focused PatentsView assignee: 8 CPC subclasses with 50% of grants classified under B29C (Shaping OR Joining OF PLASTICS; Shaping OF Material IN A Plastic State, NOT Otherwise Provided FOR; After-treatment OF THE Shaped Products, e.g. Repairing). Peak complete grant year is 2020 (2 grants) versus a trough of 1 in 2018. By volume, Westlake sits between Weiler Engineering Inc. and Willacoochee Industrial Fabrics, Inc..

Westlake's three-year grant acceleration

Westlake Longview Corporation shows 2 grants in 2022–2024 against only 4 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.

Weiler Engineering

8
Weldon Industries

8
Westech Engineeri…

8
Western Industries

8
Westmill Industri…

8
Whitehead Investm…

8
Wiha Werkzeuge

8
Willacoochee Indu…

8
Westlake Longview ◀

8

What this shows Westlake holds 8 patents at rank #33,887, shown against the 8 assignees closest to it in grant volume rather than the industry's largest filers.

Companies ranked near Westlake

By rank, the assignees closest to #33,887 in granted patent volume.

Leaders in B29C (Shaping OR Joining OF Plastics)

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

Westlake's Innovation Score vs. every tracked assignee

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

31 36th percentile higher than 36% 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 · 2018–2025

Grants by year

Teal-shaded recent years (2020–present) versus the 2018–2019 baseline. Full figures in the table below.

View data table

Westlake Longview Corporation patent grants by year, 2015–2025
Year	Patents Granted	Share of Period
2018	1	12.5%
2019	1	12.5%
2020	2	25.0%
2021	1	12.5%
2023	2	25.0%
2025partial year	1	12.5%

Which technologies does Westlake Longview Corporation patent most?

B29C - Shaping OR Joining OF PLASTICS; Shaping OF Material IN A Plastic State, NOT Otherwise Provided FOR; After-treatment OF THE Shaped Products, e.g. Repairing 4

B29K - Indexing Scheme Associated With Subclasses B29b, B29c OR B29d, Relating TO Moulding Materials OR TO Materials FOR ; Moulds, ; Reinforcements, Fillers OR Preformed Parts, e.g. Inserts 4

B01D - Separation 4

Y02P - Climate Change Mitigation Technologies IN THE Production OR Processing OF Goods 4

B29B - Preparation OR Pretreatment OF THE Material TO BE SHAPED; Making Granules OR PREFORMS; Recovery OF Plastics OR Other Constituents OF Waste Material Containing Plastics 4

C08L - Compositions OF Macromolecular Compounds 4

C09J - ADHESIVES; Non-mechanical Aspects OF Adhesive Processes IN GENERAL; Adhesive Processes NOT Provided FOR ELSEWHERE; USE OF Materials AS Adhesives 4

C08F - Macromolecular Compounds Obtained BY Reactions Only Involving Carbon-to-carbon Unsaturated Bonds 4

Top 8 of 8 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

Westlake Longview Corporation's patent record in context - here's where to go next.

Westlake Longview Corporation's lead technology class is B29C (Shaping OR Joining OF PLASTICS; Shaping OF Material IN A Plastic State, NOT Otherwise Provided FOR; After-treatment OF THE Shaped Products, e.g. Repairing), 50% of its portfolio - see every assignee active in that class. Explore B29C
Ranked #33,886 of 49,997 tracked assignees by patent volume - see the full leaderboard. See the ranking
Compare Westlake Longview Corporation against Weiler Engineering Inc., an assignee filing at a similar volume. Compare portfolios
Innovation Score of 31.1/100 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.