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Gloucestershire, United Kingdom

Nl Petroleum Products Limited

USPTO Granted Patents = 19

Forward Citations = 538

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10 inventors (with patents filed for the assignee):

John D Barr (7 out of 40 patents)

John M Fuller (4 out of 22 patents)

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: Sort by Forward Citations

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),

NL Petroleum Products Limited is a leading provider of petroleum products in the United States. With a focus on quality and reliability, we supply a wide range of fuels and lubricants to meet the needs of our customers. Our state-of-the-art facilities and experienced team ensure that we deliver exceptional service and products to businesses and consumers across the country.

This text is generated by artificial intelligence and may not be accurate.

Company Badge

USPTO Data Jan 1 1976 - Dec 30 2025

19 Patents

#2 in Gloucestershire

#928 in United Kingdom

#31,708 in the World

Gloucestershire, United Kingdom

Nl Petroleum Products Limited

Forward Citations = 538

10 inventors:

John D Barr (7 out of 40 patents)

John M Fuller (4 out of 22 patents)

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)

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