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Donald R. Sjogren
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St. John, IN, US
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Patents Grants
last 30 patents
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Patent Grant
Composition comprising a concentrate of natural asphaltene in fluxi...
Patent number
11,618,824
Issue date
Apr 4, 2023
AMERICAN GILSONITE COMPANY
Bart Lungren
C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
Patents Applications
last 30 patents
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Patent Application
COMPOSITION COMPRISING A CONCENTRATE OF NATURAL ASPHALTENE IN FLUXI...
Publication number
20200032063
Publication date
Jan 30, 2020
AMERICAN GILSONITE COMPANY
Bart Lungren
C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...