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For the Inventor, By the Inventor

Groveland, MA, United States of America

A.w. Chesterton Company


USPTO Granted Patents = 91



Trademarks = 9

Forward Citations = 967

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56 inventors (with patents filed for the assignee):

goldMedal Henri V Azibert (39 out of 39 patents)

silverMedal Michael P Grimanis (12 out of 12 patents)

bronzeMedal Marlen S Clark (9 out of 9 patents)

4.  Robert E Rockwood (7 out of 32 patents)

5.  Shifeng Wu (7 out of 7 patents)

6.  Ann T Attenasio (7 out of 8 patents)

7.  Richard P Antkowiak (6 out of 6 patents)

8.  Paul Vincent Starbile (5 out of 6 patents)

9.  Philip Michael Mahoney, Jr (5 out of 5 patents)

10.  Joseph K Kaleshian (5 out of 5 patents)

11.  Christopher A Kowalski (5 out of 5 patents)

12.  Bo Ruan (5 out of 5 patents)

13.  Robert James Powers (5 out of 6 patents)

14.  Dale J Warner (5 out of 13 patents)

15.  Margaret B Willbrant (5 out of 5 patents)


Core Competencies:
Mechanical Seals
Packing Assembly
Fluid Environment Optimization
Labyrinth Seal Assembly
Elastomer Spring Seals
Dynamic Sealing
Rotary Seal
Compression Packing Seal
Non-Contacting Seals
Secondary Sealing Assembly
High Temperature Coatings
RFID Sensor Integration

91 patents:

1. 12359727 - Active flush regulation system for use with a mechanical seal or a packing assembly (2025-07-15),
2. 12331836 - System and method for automatically energizing packing material with a packing loading assembly (2025-06-17),
3. 12152677 - System and method for optimizing a fluid environment in split mechanical seals (2024-11-26),
4. 12085109 - Single point actuation low-profile lock ring for a mechanical seal (2024-09-10),
5. 12060803 - Split polymer labyrinth seal assembly (2024-08-13),
6. 12000489 - Elastomer spring type mechanical seal (2024-06-04),
7. 11835140 - Method of forming sealing elements for use in a mechanical seal (2023-12-05),
8. 11834583 - High temperature protective coating (2023-12-05),
9. 11608898 - Externally energized secondary seals in split mechanical seals (2023-03-21),
10. 11608896 - Multiple component seal assembly (2023-03-21),
11. 11441684 - Sealing cover element in a mechanical seal (2022-09-13),
12. 11237080 - Mechanical seal with integrated RFID sensor (2022-02-01),
13. 10711898 - Methods and apparatuses for producing a braided dual-sided compression packing seal and methods of using the same (2020-07-14),
14. 10473221 - Matrix split rotary seal (2019-11-12),
15. 10352457 - Self aligning split mechanical seal employing a rotary seal ring having non-flat end faces (2019-07-16),
A.W. Chesterton Company is a global leader in fluid sealing solutions, industrial fluid handling equipment, and associated services. With a rich history dating back to 1884, the company offers innovative products and technologies to help customers achieve efficiency, reliability, and environmental sustainability in their operations. Chesterton serves a diverse range of industries including oil and gas, chemical processing, power generation, and water/wastewater treatment.
This text is generated by artificial intelligence and may not be accurate.

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USPTO Data Jan 1 1976 - Dec 16 2025

91 Patents

#1 in Groveland, MA

#221 in Massachusetts

#3,956 in US

#8,177 in the World

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Groveland, MA, United States of America

A.w. Chesterton Company

Forward Citations = 967

56 inventors:

goldMedal Henri V Azibert (39 out of 39 patents)

silverMedal Michael P Grimanis (12 out of 12 patents)

bronzeMedal Marlen S Clark (9 out of 9 patents)

4.  Robert E Rockwood (7 out of 32 patents)

5.  Shifeng Wu (7 out of 7 patents)

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