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Darryl J. Doan — 4 Patents

UNUnknown: 6 patents #2,010 of 83,584Top 3%
Laurel, MT: #2 of 14 inventorsTop 15%
Montana: #558 of 3,198 inventorsTop 20%
Overall (All Time): #1,080,739 of 4,157,543Top 30%
4 Patents All Time
Darryl J. Doan has been granted 4 US patents while listed as an inventor at Unknown. The first was granted in 1988 and the most recent in August 1992. Darryl J. Doan ranks #1,080,739 of 4,157,543 US inventors in our database (top 26.0%). Patent records list Darryl J. Doan in Laurel, MT, US.

Issued Patents All Time

Showing 1–4 of 4 patents

Patent #TitleCo-InventorsDate
RE34041 Disposable hazardous and radioactive liquid aqueous waste composition and method — 1992-08-25
RE33915 Disposable hazardous and radioactive liquid hydrocarbon waste composition and method — 1992-05-05
4781860 Disposable hazardous and radioactive liquid aqueous waste composition and method — 1988-11-01
4778627 Disposable hazardous and radioactive liquid hydrocarbon waste composition and method — 1988-10-18

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