USPTO 2015–2025 USPTO PatentsView Foreign Corporation

Dunlop Oil & Marine Ltd.

USPTO PatentsView assignee record - 7 granted patents across 16 technology areas, active 2016–2024. Filing-trend and competitive-moat analysis cross-referenced to USPTO Patent Public Search. Primary class: F16L (PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL).

Compiled byPlainPatent Editorial, US Patent Intelligence Editorial Team · May 15, 2026

Explore the portfolio See the ranking

Total patents granted

CPC technology areas

13.7

Avg claims per patent

+33%

5-year filing velocity

The verdict

Dunlop holds 7 US patents across 16 technology areas, rank #35,078 of 50,000 tracked assignees.

#35,078
of 50,000 US assignees by volume: Top 14%
by Innovation Score (49.5/100): 13.7
avg claims per patent: +33%
filing velocity, last 5 yrs

Portfolio overview

Dunlop Oil & Marine Ltd. has been granted 7 US utility patents between 2016 and 2024, placing Dunlop Oil & Marine Ltd. at rank #35,078 across all assignees tracked by PlainPatent. This portfolio spans 16 distinct Cooperative Patent Classification (CPC) subclasses, averaging 13.7 claims per patent with primary concentration in F16L (PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL). As a Foreign Corporation, Dunlop Oil & Marine Ltd. is one of the more focused assignees in the PatentsView dataset. By volume, Dunlop sits between Dremio Corporation (7 patents, rank #35,074) and Dyconex Ag (7 patents, rank #35,082) - the closest US assignees by grant volume. The composite Innovation Score of 49.5/100 blends portfolio volume, filing velocity, technology breadth, and claim depth into a single comparable measure drawn directly from USPTO PatentsView records.

Filing cadence tells the strategic story. Between 2020 and 2025 the company received 4 grants, compared with 3 in the 2015–2019 window, a +33% shift in five-year velocity. Steady filing volume suggests sustained innovation without dramatic pivots. The Foreign Corporation classification further shapes interpretation, since corporate, government, and individual filers pursue patents for materially different reasons.

Claim depth and technology breadth together indicate competitive posture. Dunlop Oil & Marine Ltd.'s 13.7 average claims per patent sits within the typical range for solid legal coverage without excessive prosecution cost, while concentration in 16 subclasses points to a focused technical program. Combined with portfolio volume, these signals let analysts, investors, and licensing professionals benchmark Dunlop Oil & Marine Ltd. against peers pursuing similar technology classes.

Dremio

7
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7
Dryfhout Enterpri…

7
Duck Yang Industry

7
Durafuse Frames

7
Duvas

7
Dwellwell Analyti…

7
Dyconex

7
Dunlop Oil & Mari… ◀

7

What this shows Dunlop holds 7 patents at rank #35,078, shown against the 8 assignees closest to it in grant volume rather than the industry's largest filers.

Companies ranked near Dunlop

By rank, the assignees closest to #35,078 in granted patent volume.

Leaders in F16L (Pipes)

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

Dunlop's Innovation Score vs. every tracked assignee

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

50 Top 14% higher than 86% of 50,000 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 · 2016–2024

Grants by year

Teal-shaded recent years (2020–present) versus the 2016–2019 baseline. Full figures in the table below.

View data table

Dunlop Oil & Marine Ltd. patent grants by year, 2015–2025
Year	Patents Granted	Share of Period
2016	2	28.6%
2018	1	14.3%
2021	1	14.3%
2022	1	14.3%
2023	1	14.3%
2024	1	14.3%

Which technologies does Dunlop Oil & Marine Ltd. patent most?

F16L - PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL 6

B63B - SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 4

B67D - DISPENSING, DELIVERING OR TRANSFERRING LIQUIDS, NOT OTHERWISE PROVIDED FOR 3

E21B - EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS 2

G05D - SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES 2

H04B - TRANSMISSION 2

B29D - PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE 1

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 1

G01C - MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY 1

H04L - TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION 1

D02G - CRIMPING OR CURLING FIBRES, FILAMENTS, THREADS, OR YARNS; YARNS OR THREADS 1

D10B - INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES 1

B32B - LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM 1

Y10T - TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION 1

G01M - TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR 1

Top 15 of 16 technology areas

Patent Moat Analysis

Portfolio Volume Light

Tech Breadth Focused

Claim Depth Standard

Velocity Growing

Where it ranks

Overall rank by patents

#35,078

Across all tracked assignees

Innovation Score

49.5 out of 100

View all rankings →

Data Source

USPTO PatentsView, US granted patents 2015–2025

How is Innovation Score calculated?

Frequently Asked Questions

How many patents does Dunlop Oil & Marine Ltd. hold?

Dunlop Oil & Marine Ltd. holds 7 US granted patents filed between 2016 and 2024, spanning 16 technology areas.

What is Dunlop Oil & Marine Ltd.'s Innovation Score?

Dunlop Oil & Marine Ltd. has an Innovation Score of 49.5 out of 100. This composite metric weighs portfolio volume (40%), filing velocity (20%), technology breadth (25%), and claim depth (15%).

What technology areas does Dunlop Oil & Marine Ltd. focus on?

Dunlop Oil & Marine Ltd.'s top technology area is F16L (PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL) with 6 patents. The company has filed patents in 16 CPC subclasses total.

Is Dunlop Oil & Marine Ltd.'s patent filing rate increasing or decreasing?

Dunlop Oil & Marine Ltd.'s recent filing velocity is +33% compared to the prior five-year period. The company is maintaining or growing its patent output.

What does claim depth mean for Dunlop Oil & Marine Ltd.'s patents?

Dunlop Oil & Marine Ltd.'s patents average 13.7 claims each. This falls within the standard range, providing solid legal coverage.

How is the Dunlop Oil & Marine Ltd. 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.

How to use this portfolio

Dunlop's 7 grants land it in the top 14% by Innovation Score, but volume alone doesn't tell you where the strength sits.

Read that count against the largest US assignees before treating it as dominance - Dunlop ranks #35,078 of 50,000. Top 50 holders
Most of this portfolio concentrates in F16L - see who else leads that technology area. F16L leaders
Check what the four-part Innovation Score actually rewards before comparing it to another company. How the score works

Patent counts and the Innovation Score measure patenting activity, not commercial success or the legal strength of any patent. Many patents are filed defensively. Verify the status of an individual patent against official USPTO records.

Data sourced from USPTO PatentsView - official U.S. government patent data. See our methodology for computation details. Retrieved and formatted by PlainPatent Editorial

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 byPlainPatent Editorial, US Patent Intelligence Editorial Team · 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.