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For the Inventor, By the Inventor

Stoneham, MA, United States of America

Chesterton International Company


USPTO Granted Patents = 2

Forward Citations = 40

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1 inventor (with patents filed for the assignee):

goldMedal Michael H Ostrowski (2 out of 5 patents)


2 patents:

1. 5769427 - Dual seal with clean barrier fluid and dynamic pressure control (1998-06-23),
2. 5636847 - Dual face seal clean barrier fluid and dynamic pressure control system (1997-06-10),
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USPTO Data Jan 1 1976 - Dec 16 2025

2 Patents

#6 in Stoneham, MA

#4,821 in Massachusetts

#92,551 in US

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Stoneham, MA, United States of America

Chesterton International Company

Forward Citations = 40

1 inventor:

goldMedal Michael H Ostrowski (2 out of 5 patents)

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