Frederick S. Lewis

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Nashua, NH, US

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Patents Grantslast 30 patents

Information Patent Grant
Cross braced vacuum washer
- Patent number 5,480,545
- Issue date Jan 2, 1996
- Ingersoll-Rand Company
- Frederick S. Lewis
- B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
Information Patent Grant
Vacuum filtration system and method of filtering pulp fibers from p...
- Patent number 5,281,343
- Issue date Jan 25, 1994
- Ingersoll-Rand Company
- Frederick S. Lewis
- D21 - PAPER-MAKING PRODUCTION OF CELLULOSE
Information Patent Grant
Pressure pulp washer
- Patent number 4,894,121
- Issue date Jan 16, 1990
- Ingersoll-Rand Company
- Oscar Luthi
- D21 - PAPER-MAKING PRODUCTION OF CELLULOSE
Information Patent Grant
Method of washing pulp in a pressure pulp washer adding two washing...
- Patent number 4,808,265
- Issue date Feb 28, 1989
- Ingersoll-Rand Company
- Oscar Luthi
- D21 - PAPER-MAKING PRODUCTION OF CELLULOSE