Dennis D. O'Rell

Follow

Person

Boxborough, MA, US

People

Patents Grantslast 30 patents

Information Patent Grant
Battery separator
- Patent number 4,369,236
- Issue date Jan 18, 1983
- W. R. Grace & Co.
- Dennis D. O'Rell
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Battery separator
- Patent number 4,368,243
- Issue date Jan 11, 1983
- W. R. Grace & Co.
- Dennis D. O'Rell
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Battery separator
- Patent number 4,330,602
- Issue date May 18, 1982
- W. R. Grace & Co.
- Dennis D. O'Rell
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Lead acid battery with separator having long fibers
- Patent number 4,265,985
- Issue date May 5, 1981
- W. R. Grace & Co.
- Dennis D. O'Rell
- D21 - PAPER-MAKING PRODUCTION OF CELLULOSE
Information Patent Grant
Battery interseparator
- Patent number 4,264,691
- Issue date Apr 28, 1981
- W. R. Grace & Co.
- Dennis D. O'Rell
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Battery separator
- Patent number 4,228,225
- Issue date Oct 14, 1980
- W. R. Grace & Co.
- Dennis D. O'Rell
- G09 - EDUCATION CRYPTOGRAPHY DISPLAY ADVERTISING SEALS
Information Patent Grant
Battery separator
- Patent number 4,216,281
- Issue date Aug 5, 1980
- W. R. Grace & Co.
- Dennis D. O'Rell
- D21 - PAPER-MAKING PRODUCTION OF CELLULOSE