For the Inventor, By the Inventor

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Chicago, IL, United States of America

Clem Environmental Corporation

USPTO Granted Patents = 3

Forward Citations = 71

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4 inventors (with patents filed for the assignee):

William Simpson (1 out of 1 patent)

Arthur J Clem (1 out of 4 patents)

Richard W Carriker (1 out of 6 patents)

4. Mark Clarey (1 out of 5 patents)

3 patents: Sort by Forward Citations

1. 5529438 - Geosynthetic clay liner with modified edges for improved sealing (1996-06-25),

2. 4927297 - Leak prevention structure, method and apparatus (1990-05-22),

3. 4501788 - Waterproofing soil (1985-02-26),

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USPTO Data Jan 1 1976 - Dec 16 2025

3 Patents

#770 in Chicago, IL

#3,359 in Illinois

#71,949 in US

Chicago, IL, United States of America

Clem Environmental Corporation

Forward Citations = 71

4 inventors:

William Simpson (1 out of 1 patent)

Arthur J Clem (1 out of 4 patents)

Richard W Carriker (1 out of 6 patents)

4. Mark Clarey (1 out of 5 patents)

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