John E. Sorenson

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North Reading, MA, US

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Patents Grantslast 30 patents

Information Patent Grant
Concrete additive product and method of use
- Patent number 5,224,774
- Issue date Jul 6, 1993
- W. R. Grace & Co.-Conn.
- Stephen A. Valle
- B28 - WORKING CEMENT, CLAY, OR STONE
Information Patent Grant
Method for modifying concrete properties
- Patent number 5,203,629
- Issue date Apr 20, 1993
- W. R. Grace & Co.-Conn.
- Stephen A. Valle
- B28 - WORKING CEMENT, CLAY, OR STONE