Dahai Yu

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Patents Grantslast 30 patents

Information Patent Grant
Process for the production of 1,3-propanediol by hydrogenating 3-hy...
- Patent number 6,232,511
- Issue date May 15, 2001
- E. I. Du Pont de Nemours and Company
- Thomas Haas
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Process for production of polypropylene terephthalate
- Patent number 5,798,433
- Issue date Aug 25, 1998
- Zimmer Aktiengesellschaft
- Wolfgang Schmidt
- C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...