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For the Inventor, By the Inventor

Chardon, OH, United States of America

Essef Corporation


USPTO Granted Patents = 41

Trademarks = 5

Forward Citations = 643

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36 inventors (with patents filed for the assignee):

goldMedal James C Murphy (10 out of 12 patents)

silverMedal Edward T LeBreton (7 out of 11 patents)

bronzeMedal Robert D Wilkes (5 out of 5 patents)

4.  Ronald B Robol (3 out of 35 patents)

5.  James C Hlebovy (3 out of 10 patents)

6.  Erik Coeckelbergs (3 out of 3 patents)

7.  Gerald S Boyce (3 out of 3 patents)

8.  Mark D Shaw (2 out of 56 patents)

9.  J Tad Heyman (2 out of 42 patents)

10.  Kevin Goodge (2 out of 3 patents)

11.  Thomas G Carter (2 out of 10 patents)

12.  Laurence M Bierce (2 out of 33 patents)

13.  George S Ellis (2 out of 7 patents)

14.  Steven C Suchanek (2 out of 2 patents)

15.  Jim Hlebovy (2 out of 2 patents)


Core Competencies:
Pressure Vessel
Composite Pressure Vessels
Filament Wound Housing
Hydropneumatic Pressure Vessel
Quick-Release Fitting Assembly
Blow-Molded Pressure Tank
Dynamic Pressure Relief Seal
Regenerative Diatomaceous Earth Filter
Water Conditioning Systems
Swimming Pool Drain Assembly
Pressure Vessel Manufacturing
Sealing Techniques

41 patents:

1. 7090736 - Pressure vessel prestressing technique (2006-08-15),
2. 7017771 - Pressure vessel (2006-03-28),
3. 6932391 - Quick-release fitting assembly (2005-08-23),
4. 6793095 - Blow-molded pressure tank with spin-welded connector (2004-09-21),
5. 6660214 - Pressure vessel manufacture method (2003-12-09),
6. 6565793 - Method for fabricating composite pressure vessels (2003-05-20),
7. 6485668 - Method for fabricating composite pressure vessels and products fabricated by the method (2002-11-26),
8. 6298553 - Composite pressure vessel with heat exchanger (2001-10-09),
9. 6190598 - Method for making thermoplastic composite pressure vessels (2001-02-20),
10. 6171423 - Method for fabricating composite pressure vessels (2001-01-09),
11. 5900107 - Fitting installation process and apparatus for a molded plastic vessel (1999-05-04),
12. 5878773 - Auxiliary flow path valve (1999-03-09),
13. 5866001 - Filament wound housing for a reverse osmosis filter cartridge (1999-02-02),
14. 5819978 - Two piece composite inlet (1998-10-13),
15. 5806705 - Sealing technique for hydropneumatic pressure vessel (1998-09-15),
Essef Corporation is a global leader in manufacturing advanced materials and components. With over 50 years of experience, our company specializes in providing innovative solutions in various industries including aerospace, automotive, electronics, and defense. Essef Corporation is committed to delivering superior quality products, exceptional customer service, and sustainable practices.
This text is generated by artificial intelligence and may not be accurate.

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USPTO Data Jan 1 1976 - Dec 30 2025

41 Patents

#2 in Chardon, OH

#338 in Ohio

#8,166 in US

#16,217 in the World

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Chardon, OH, United States of America

Essef Corporation

Forward Citations = 643

36 inventors:

goldMedal James C Murphy (10 out of 12 patents)

silverMedal Edward T LeBreton (7 out of 11 patents)

bronzeMedal Robert D Wilkes (5 out of 5 patents)

4.  Ronald B Robol (3 out of 35 patents)

5.  James C Hlebovy (3 out of 10 patents)

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