William E. Zimmerman

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Covington, VA, US

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Patents Grantslast 30 patents

Information Patent Grant
Method and apparatus for detecting and controlling the caustic in p...
- Patent number 4,065,348
- Issue date Dec 27, 1977
- Westvaco Corporation
- William E. Zimmerman
- D21 - PAPER-MAKING PRODUCTION OF CELLULOSE
Information Patent Grant
Pulp bleaching process control using photocells to measure pulp bri...
- Patent number 3,968,006
- Issue date Jul 6, 1976
- Westvaco Corporation
- William E. Zimmerman
- D21 - PAPER-MAKING PRODUCTION OF CELLULOSE