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For the Inventor, By the Inventor

Oklahoma City, OK, United States of America

Sunstone Corporation

USPTO Granted Patents = 12

% Expired Patents = 50.0


Trademarks = 1

Forward Citations = 382

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11 inventors (with patents filed for the assignee):

goldMedal William James Hughes (9 out of 33 patents)

silverMedal Mark Dunbar (2 out of 6 patents)

bronzeMedal Murl Ray Richardson (2 out of 3 patents)

4.  W James Hughes (2 out of 2 patents)

5.  Jimmie Josh Renfro (2 out of 4 patents)

6.  Kurt D Vandervort (1 out of 4 patents)

7.  Thomas L Pettigrew (1 out of 2 patents)

8.  Kenneth D Young (1 out of 8 patents)

9.  Richard Wayne Adams (1 out of 3 patents)

10.  Ernest Kabay (1 out of 1 patent)

11.  Gabriella H Kabay (1 out of 1 patent)

12.  Murl R Richardson (2 patents)


12 patents:

1. 8028750 - Force balanced rotating pressure control device (2011-10-04),
2. 7981379 - Producing nitrogen to use in under balanced drilling, secondary recovery production operations and pipeline maintenance (2011-07-19),
3. 7537062 - Flapper valve and actuator (2009-05-26),
4. 7468173 - Method for producing nitrogen to use in under balanced drilling, secondary recovery production operations and pipeline maintenance (2008-12-23),
5. 7380590 - Rotating pressure control head (2008-06-03),
6. 7226090 - Rod and tubing joint of multiple orientations containing electrical wiring (2007-06-05),
7. 7137945 - Underground treatment of biowaste (2006-11-21),
8. 6899188 - Down hole drilling assembly with concentric casing actuated jet pump (2005-05-31),
9. 6877571 - Down hole drilling assembly with independent jet pump (2005-04-12),
10. 6769498 - Method and apparatus for inducing under balanced drilling conditions using an injection tool attached to a concentric string of casing (2004-08-03),
11. 6666274 - Tubing containing electrical wiring insert (2003-12-23),
12. 4857228 - Phosphors and methods of preparing the same (1989-08-15),
Company Overview
Sunstone Corporation, based in Oklahoma City, specializes in advanced technology solutions, focusing on the development and manufacturing of innovative products for various sectors. The company is known for its expertise in areas such as electronics, telecommunications, and industrial applications. With a commitment to research and development, Sunstone aims to enhance operational efficiencies and drive technological advancements, positioning itself as a key player in the evolving landscape of technology and engineering.
Profile summary synthesized from public USPTO records and patent filings.

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USPTO Data Jan 1 1976 - Oct 20 2026

Sunstone Corporation USPTO Patent Assignee Logo
12 Patents

#27 in Oklahoma City, OK

#123 in Oklahoma

#25,578 in US

#48,209 in the World

Oklahoma City, OK (US)
Oklahoma City, OK, United States of America

Sunstone Corporation

Forward Citations = 382

11 inventors:

goldMedal William James Hughes (9 out of 33 patents)

silverMedal Mark Dunbar (2 out of 6 patents)

bronzeMedal Murl Ray Richardson (2 out of 3 patents)

4.  W James Hughes (2 out of 2 patents)

5.  Jimmie Josh Renfro (2 out of 4 patents)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Sunstone Corporation. Retrieved from https://idiyas.com/company/sunstone

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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