John C. Helfrick

Follow

Person

San Diego, CA, US

People

Patents Grantslast 30 patents

Information Patent Grant
Sizing composition
- Patent number 9,127,407
- Issue date Sep 8, 2015
- Hewlett-Packard Development Company, L.P.
- Steven L. Webb
- D21 - PAPER-MAKING PRODUCTION OF CELLULOSE

Patents Applicationslast 30 patents

Information Patent Application
SIZING COMPOSITION
- Publication number 20140305606
- Publication date Oct 16, 2014
- Hewlett-Packard Development Company, L.P.
- Steven L. Webb
- D21 - PAPER-MAKING PRODUCTION OF CELLULOSE