Johannes C. van der Werff

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Sugarland, TX, US

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Patents Grantslast 30 patents

Information Patent Grant
Method for producing asphalts containing an epoxy-containing polyme...
- Patent number 5,574,095
- Issue date Nov 12, 1996
- Shell Oil Company
- Johannes C. van der Werff
- C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
Information Patent Grant
Process for the preparation of a phosphoric-acid-containing asphalt...
- Patent number 5,519,073
- Issue date May 21, 1996
- Shell Oil Company
- Johannes C. van der Werff
- E01 - CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES