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Tulsa, OK, United States of America

Cities Service Oil and Gas Corporation

USPTO Granted Patents = 22

Forward Citations = 718

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20 inventors (with patents filed for the assignee):

Matthew L Marrocco, Iii (4 out of 36 patents)

Burton B Sandiford (4 out of 22 patents)

Raymond J Jasinski (4 out of 6 patents)

4. Roger C Zillmer (3 out of 5 patents)

5. Paul V Roling (2 out of 33 patents)

6. B Timothy Pennington (2 out of 15 patents)

7. Uriel M Oko (2 out of 3 patents)

8. Richard L Veazey (2 out of 21 patents)

9. David E Aylward (2 out of 4 patents)

10. John T Hsieh (1 out of 9 patents)

11. David J Blumer (1 out of 2 patents)

12. Michael L Junker (1 out of 4 patents)

13. Richard A Mueller (1 out of 4 patents)

14. Robert M Baldwin (1 out of 1 patent)

15. David L Laughry (1 out of 1 patent)

22 patents: Sort by Forward Citations

1. 4939203 - Gel for retarding water flow (1990-07-03),

2. 4863572 - Corrosion probe and method for measuring corrosion rates (1989-09-05),

3. 4840719 - Corrosion probe and method for measuring corrosion rates (1989-06-20),

4. 4818370 - Process for converting heavy crudes, tars, and bitumens to lighter (1989-04-04),

5. 4796700 - Process for retarding fluid flow (1989-01-10),

6. 4784729 - Electrochemical analysis method using corrosion probe (1988-11-15),

7. 4752360 - Corrosion probe and method for measuring corrosion rates (1988-06-21),

8. 4738770 - Apparatus and method of removal of catalyst blockage from reactor (1988-04-19),

9. 4703803 - Composition and method for slowly dissolving siliceous material (1987-11-03),

10. 4685191 - Apparatus and process for selectively expanding to join one tube into (1987-08-11),

11. 4673038 - Gel and process for preventing carbon dioxide break through (1987-06-16),

12. 4666957 - Gel for retarding water flow (1987-05-19),

13. 4665986 - Gel and method for reducing steam channeling (1987-05-19),

14. 4665143 - Co-catalyst dispersion method (1987-05-12),

15. 4665141 - Process for polymerizing a monomer (1987-05-12),

Cities Service Oil and Gas Corporation, now known as CITGO, is an American refiner, transporter and marketer of transportation fuels, lubricants, petrochemicals and other industrial products. In operation since 1910, CITGO has a strong presence in the United States and internationally, providing quality products and services to customers around the world.

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

Company Badge

USPTO Data Jan 1 1976 - Dec 30 2025

22 Patents

#30 in Tulsa, OK

#70 in Oklahoma

#14,533 in US

#27,905 in the World

Tulsa, OK, United States of America

Cities Service Oil and Gas Corporation

Forward Citations = 718

20 inventors:

Matthew L Marrocco, Iii (4 out of 36 patents)

Burton B Sandiford (4 out of 22 patents)

Raymond J Jasinski (4 out of 6 patents)

4. Roger C Zillmer (3 out of 5 patents)

5. Paul V Roling (2 out of 33 patents)

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