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For the Inventor, By the Inventor

Gloucestershire, United Kingdom

Nl Petroleum Products Limited

Calculating rank
USPTO Granted Patents = 19

Forward Citations = 539

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10 inventors (with patents filed for the assignee):

goldMedal John D Barr (7 out of 40 patents)

silverMedal John M Fuller (4 out of 22 patents)

bronzeMedal Michael T Wardley (4 out of 6 patents)

4.  David N Shirley-Fisher (2 out of 2 patents)

5.  David Shirley (2 out of 2 patents)

6.  Malcolm Roy Taylor (1 out of 26 patents)

7.  Nigel Dennis Griffin (1 out of 39 patents)

8.  Terry R Matthias (1 out of 1 patent)

9.  Malcolm R Taylor (1 out of 3 patents)

10.  Michael C Regan (1 out of 3 patents)


19 patents:

1. 4928777 - Cutting elements for rotary drill bits (1990-05-29),
2. 4823892 - Rotary drill bits (1989-04-25),
3. 4804049 - Rotary drill bits (1989-02-14),
4. 4790396 - Rotary drill bits for use in coring holes in subsurface formations (1988-12-13),
5. 4781256 - Cutting structures for rotary drill bits (1988-11-01),
6. 4762028 - Rotary drill bits (1988-08-09),
7. 4733735 - Rotary drill bits (1988-03-29),
8. 4720371 - Rotary drill bits (1988-01-19),
9. 4718505 - Rotary drill bits (1988-01-12),
10. 4705122 - Cutter assemblies for rotary drill bits (1987-11-10),
11. 4700790 - Rotary drill bits (1987-10-20),
12. 4699227 - Method of forming cutting structures for rotary drill bits (1987-10-13),
13. 4697654 - Rotary drill bits (1987-10-06),
14. 4694919 - Rotary drill bits with nozzle former and method of manufacturing (1987-09-22),
15. 4679639 - Rotary drill bits and cutting elements for such bits (1987-07-14),
Company Overview
Nl Petroleum Products Limited is a prominent player in the petroleum sector, specializing in the development and manufacturing of high-quality fuel and lubricant products. The company focuses on innovative solutions that enhance performance and efficiency in various applications, catering to both industrial and consumer markets. Based in Gloucestershire, the organization is committed to sustainability and advancing technologies that support cleaner energy solutions, positioning itself as a key contributor to the evolving energy landscape.
Profile summary synthesized from public USPTO records and patent filings.

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USPTO Data Jan 1 1976 - Oct 27 2026

19 Patents

#1 in Gloucestershire

#928 in United Kingdom

#32,705 in the World

Gloucestershire, GB
Gloucestershire, United Kingdom

Nl Petroleum Products Limited

Forward Citations = 539

10 inventors:

goldMedal John D Barr (7 out of 40 patents)

silverMedal John M Fuller (4 out of 22 patents)

bronzeMedal Michael T Wardley (4 out of 6 patents)

4.  David N Shirley-Fisher (2 out of 2 patents)

5.  David Shirley (2 out of 2 patents)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Nl Petroleum Products Limited. Retrieved from https://idiyas.com/company/nl-petroleum-products

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

Data Sources: USPTO Patent Grant XML, Patent Center, EPO & CIPO • Normalized by IDiyas Innovation Graph. Methodology & provenance architecturePlease report any incorrect information to [email protected]
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