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For the Inventor, By the Inventor

Anacortes, WA, United States of America

Yost Brothers LLC


USPTO Granted Patents = 3

Trademarks = 1

Forward Citations = 6

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3 inventors (with patents filed for the assignee):

goldMedal Karl William Yost (3 out of 23 patents)

silverMedal Richard Wayne Alexander (3 out of 7 patents)

bronzeMedal William H Simon (1 out of 16 patents)


3 patents:

1. 12227439 - Systems to treat PFAS and other persistent organic compounds and oxidizable matter in aqueous fluids (2025-02-18),
2. 11724291 - Closure methods for mines (2023-08-15),
3. 11680001 - Systems and methods for treating acidity, heavy metals, and solids in acid mine drainage and other aqueous fluids (2023-06-20),
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USPTO Data Jan 1 1976 - Dec 16 2025

3 Patents

#4 in Anacortes, WA

#1,741 in Washington

#71,953 in US

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Anacortes, WA, United States of America

Yost Brothers LLC

Forward Citations = 6

3 inventors:

goldMedal Karl William Yost (3 out of 23 patents)

silverMedal Richard Wayne Alexander (3 out of 7 patents)

bronzeMedal William H Simon (1 out of 16 patents)

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