David H. Dumas

Person

Hockessin, DE, US

People

Patents Grantslast 30 patents

Information Patent Grant
2-oxetanone sizing agents and their use in paper
- Patent number 6,316,095
- Issue date Nov 13, 2001
- Hercules Incorporated
- Donald K. Black
- D21 - PAPER-MAKING PRODUCTION OF CELLULOSE
Information Patent Grant
Process of using fine paper containing 2-oxetanone sizing agent in...
- Patent number 6,007,906
- Issue date Dec 28, 1999
- Hercules Incorporated
- Kyle J. Bottorff
- D21 - PAPER-MAKING PRODUCTION OF CELLULOSE
Information Patent Grant
Pretreatment of filler with cationic ketene dimer
- Patent number 5,972,100
- Issue date Oct 26, 1999
- Hercules Incorporated
- David Howard Dumas
- D21 - PAPER-MAKING PRODUCTION OF CELLULOSE
Information Patent Grant
Process of using paper containing alkaline sizing agents with impro...
- Patent number 5,685,815
- Issue date Nov 11, 1997
- Hercules Incorporated
- Kyle J. Bottorff
- D21 - PAPER-MAKING PRODUCTION OF CELLULOSE
Information Patent Grant
Composite sheet made from mechanically delaminated vermiculite
- Patent number 5,139,615
- Issue date Aug 18, 1992
- Hercules Incorporated
- Herbert T. Conner
- C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES
Information Patent Grant
Gas-permeable, liquid-impermeable nonwoven material
- Patent number 4,904,520
- Issue date Feb 27, 1990
- Hercules Incorporated
- David H. Dumas
- A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE
Information Patent Grant
Aqueous sizing compositions
- Patent number 4,522,686
- Issue date Jun 11, 1985
- Hercules Incorporated
- David H. Dumas
- D21 - PAPER-MAKING PRODUCTION OF CELLULOSE
Information Patent Grant
Sizing method and sizing composition for use therein
- Patent number 4,478,682
- Issue date Oct 23, 1984
- Hercules Incorporated
- Ralph A. Bankert
- D21 - PAPER-MAKING PRODUCTION OF CELLULOSE
Information Patent Grant
Aqueous sizing composition comprising ketene dimer and epihalohydri...
- Patent number 4,407,994
- Issue date Oct 4, 1983
- Hercules Incorporated
- Ralph A. Bankert
- D21 - PAPER-MAKING PRODUCTION OF CELLULOSE
Information Patent Grant
Water-soluble thermosettable resinous compositions containing dicya...
- Patent number 4,380,602
- Issue date Apr 19, 1983
- Hercules Incorporated
- David H. Dumas
- D21 - PAPER-MAKING PRODUCTION OF CELLULOSE
Information Patent Grant
Sizing composition comprising a hydrophobic cellulose-reactive sizi...
- Patent number 4,317,756
- Issue date Mar 2, 1982
- Hercules Incorporated
- David H. Dumas
- D21 - PAPER-MAKING PRODUCTION OF CELLULOSE
Information Patent Grant
Sizing method and sizing composition for use therein
- Patent number 4,295,931
- Issue date Oct 20, 1981
- Hercules Incorporated
- David H. Dumas
- D21 - PAPER-MAKING PRODUCTION OF CELLULOSE
Information Patent Grant
Sizing method and sizing composition for use therein
- Patent number 4,279,794
- Issue date Jul 21, 1981
- Hercules Incorporated
- David H. Dumas
- D21 - PAPER-MAKING PRODUCTION OF CELLULOSE
Information Patent Grant
Sizing compositions
- Patent number 4,243,481
- Issue date Jan 6, 1981
- Hercules Incorporated
- David H. Dumas
- D21 - PAPER-MAKING PRODUCTION OF CELLULOSE
Information Patent Grant
Ketene dimer paper sizing compositions
- Patent number 4,240,935
- Issue date Dec 23, 1980
- Hercules Incorporated
- David H. Dumas
- D21 - PAPER-MAKING PRODUCTION OF CELLULOSE
Information Patent Grant
Gypsum wallboard and method for producing same
- Patent number T977009
- Issue date Dec 5, 1978
- Hercules Incorporated
- David H. Dumas
- 428 - Stock material or miscellaneous articles
Information Patent Grant
Water-dispersible thermosettable cationic resins from reaction of (...
- Patent number 4,087,395
- Issue date May 2, 1978
- Hercules Incorporated
- Paul Harwood Aldrich
- D21 - PAPER-MAKING PRODUCTION OF CELLULOSE
Information Patent Grant
Water-dispersible thermosettable cationic resins and paper sized th...
- Patent number 3,992,345
- Issue date Nov 16, 1976
- Hercules Incorporated
- David H. Dumas
- D21 - PAPER-MAKING PRODUCTION OF CELLULOSE
Information Patent Grant
Paper sized with ketene dimer modified water-dispersible thermosett...
- Patent number 3,990,939
- Issue date Nov 9, 1976
- Hercules Incorporated
- Paul H. Aldrich
- D21 - PAPER-MAKING PRODUCTION OF CELLULOSE
Information Patent Grant
Water-dispersible thermosettable cationic resins and paper sized th...
- Patent number 3,989,659
- Issue date Nov 2, 1976
- Hercules Incorporated
- Paul H. Aldrich
- D21 - PAPER-MAKING PRODUCTION OF CELLULOSE
Information Patent Grant
Water-dispersible thermosettable cationic resins and paper sized th...
- Patent number 3,988,280
- Issue date Oct 26, 1976
- Hercules Incorporated
- Paul H. Aldrich
- D21 - PAPER-MAKING PRODUCTION OF CELLULOSE
Information Patent Grant
Water-dispersible thermosettable cationic resins and paper sized th...
- Patent number 3,968,317
- Issue date Jul 6, 1976
- Hercules Incorporated
- David H. Dumas
- D21 - PAPER-MAKING PRODUCTION OF CELLULOSE

David H. Dumas

Person

Patents Grantslast 30 patents

2-oxetanone sizing agents and their use in paper

Process of using fine paper containing 2-oxetanone sizing agent in...

Pretreatment of filler with cationic ketene dimer

Process of using paper containing alkaline sizing agents with impro...

Composite sheet made from mechanically delaminated vermiculite

Gas-permeable, liquid-impermeable nonwoven material

Aqueous sizing compositions

Sizing method and sizing composition for use therein

Aqueous sizing composition comprising ketene dimer and epihalohydri...

Water-soluble thermosettable resinous compositions containing dicya...

Sizing composition comprising a hydrophobic cellulose-reactive sizi...

Sizing method and sizing composition for use therein

Sizing method and sizing composition for use therein

Sizing compositions

Ketene dimer paper sizing compositions

Gypsum wallboard and method for producing same

Water-dispersible thermosettable cationic resins from reaction of (...

Water-dispersible thermosettable cationic resins and paper sized th...

Paper sized with ketene dimer modified water-dispersible thermosett...

Water-dispersible thermosettable cationic resins and paper sized th...

Water-dispersible thermosettable cationic resins and paper sized th...

Water-dispersible thermosettable cationic resins and paper sized th...