John Pietrangelo

Follow

Person

Glens Falls, NY, US

People

Patents Grantslast 30 patents

Information Patent Grant
Method of treating material in a continuous digester
- Patent number 6,375,796
- Issue date Apr 23, 2002
- Andritz Inc.
- Jay K. Sheerer
- D21 - PAPER-MAKING PRODUCTION OF CELLULOSE
Information Patent Grant
Tapered screen assembly for a cellulose pulp digester
- Patent number 6,129,816
- Issue date Oct 10, 2000
- Andritz-Ahlstrom Inc.
- Jay K. Sheerer
- D21 - PAPER-MAKING PRODUCTION OF CELLULOSE
Information Patent Grant
Chip feed system
- Patent number 5,617,975
- Issue date Apr 8, 1997
- Ahlstrom Machinery Inc.
- Jerry R. Johanson
- D21 - PAPER-MAKING PRODUCTION OF CELLULOSE
Information Patent Grant
Variable stage pressure diffuser
- Patent number 5,567,279
- Issue date Oct 22, 1996
- Ahlstrom Machinery Inc.
- Joseph R. Phillips
- D21 - PAPER-MAKING PRODUCTION OF CELLULOSE