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For the Inventor, By the Inventor

Ashland, KY, United States of America

Tw Environmental, Inc.


USPTO Granted Patents = 2

% Expired Patents = 100.0

Forward Citations = 4

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2 inventors (with patents filed for the assignee):

goldMedal Trevor Wardle (1 out of 6 patents)

silverMedal Dong Dai, Legal Representative (1 out of 1 patent)


2 patents:

1. 7871460 - System and method for a moving bed adsorber for contaminant removal (2011-01-18),
2. 7309379 - Moving bed adsorber/desorber and low flow (high yield) desorber devices and their methods of use (2007-12-18),
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USPTO Data Jan 1 1976 - Sep 29 2026

2 Patents

#3 in Ashland, KY

#540 in Kentucky

#94,730 in US

Ashland, KY (US)
Ashland, KY, United States of America

Tw Environmental, Inc.

Forward Citations = 4

2 inventors:

goldMedal Trevor Wardle (1 out of 6 patents)

silverMedal Dong Dai, Legal Representative (1 out of 1 patent)

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