Robert J. Spannuth

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Washougal, WA, US

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Patents Grantslast 30 patents

Information Patent Grant
Spent pulping liquor recovery process
- Patent number 4,718,978
- Issue date Jan 12, 1988
- James River Corporation of Nevada
- Robert J. Spannuth
- D21 - PAPER-MAKING PRODUCTION OF CELLULOSE
Information Patent Grant
Pyrolysis of black liquor at high temperatures using radiant energy
- Patent number 4,637,858
- Issue date Jan 20, 1987
- Crown Zellerbach Corporation
- Edwin Matovich
- D21 - PAPER-MAKING PRODUCTION OF CELLULOSE