David C. Darwin

Person

Columbia, MD, US

People

Patents Grantslast 30 patents

Information Patent Grant
Emulsified comb polymer and defoaming agent composition and method...
- Patent number 6,139,623
- Issue date Oct 31, 2000
- W. R. Grace & Co.-Conn.
- David Charles Darwin
- C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES
Information Patent Grant
High early-strength-enhancing admixture for precast hydraulic cemen...
- Patent number 5,840,114
- Issue date Nov 24, 1998
- W. R. Grace & Co.-Conn.
- Ara Avedis Jeknavorian
- C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES
Information Patent Grant
Cement and cement composition having improved rheological properties
- Patent number 5,753,744
- Issue date May 19, 1998
- W. R. Grace & Co.-Conn.
- David Charles Darwin
- C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES
Information Patent Grant
Cement admixture product having improved rheological properties and...
- Patent number 5,728,207
- Issue date Mar 17, 1998
- W. R. Grace & Co.-Conn.
- Ahmad Arfaei
- C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES
Information Patent Grant
Cement admixture product
- Patent number 5,725,657
- Issue date Mar 10, 1998
- David Charles Darwin
- C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES
Information Patent Grant
Cement admixture product
- Patent number 5,665,158
- Issue date Sep 9, 1997
- W. R. Grace & Co.-Conn.
- David Charles Darwin
- C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES
Information Patent Grant
Cement admixture product having improved rheological properties and...
- Patent number 5,643,978
- Issue date Jul 1, 1997
- W. R. Grace & Co.-Conn.
- David Charles Darwin
- C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES
Information Patent Grant
Cement admixture product having improved rheological properties and...
- Patent number 5,633,298
- Issue date May 27, 1997
- W. R. Grace & Co.-Conn.
- Ahmad Arfaei
- C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES
Information Patent Grant
Cement and cement composition having improved rheological properties
- Patent number 5,583,183
- Issue date Dec 10, 1996
- W. R. Grace & Co.-Conn.
- David C. Darwin
- C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES
Information Patent Grant
Cement and cement composition having improved rheological properties
- Patent number 5,393,343
- Issue date Feb 28, 1995
- W. R. Grace & Co.-Conn.
- David C. Darwin
- C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES

David C. Darwin

Person

Patents Grantslast 30 patents

Emulsified comb polymer and defoaming agent composition and method...

High early-strength-enhancing admixture for precast hydraulic cemen...

Cement and cement composition having improved rheological properties

Cement admixture product having improved rheological properties and...

Cement admixture product

Cement admixture product

Cement admixture product having improved rheological properties and...

Cement admixture product having improved rheological properties and...

Cement and cement composition having improved rheological properties

Cement and cement composition having improved rheological properties