Sijbrandus E. Schaafsma

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Beek, NL

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Patents Grantslast 30 patents

Information Patent Grant
Preparation of delta-keto-esters
- Patent number 4,291,170
- Issue date Sep 22, 1981
- Stamicarbon, B.V.
- Sijbrandus E. Schaafsma
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Process for the recovery of pyrrolidone-2
- Patent number 4,264,501
- Issue date Apr 28, 1981
- Stamicarbon, B.V.
- Edmond H. J. P. Bour
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Preparation of a 2-amino-pyrroline derivative
- Patent number 4,016,175
- Issue date Apr 5, 1977
- Stamicarbon B.V.
- Sijbrandus E. Schaafsma
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Process for the preparation of pyrrolidone-2
- Patent number 4,012,418
- Issue date Mar 15, 1977
- Stamicarbon B.V.
- Sijbrandus E. Schaafsma
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Preparation of resorcinol and alkyl-substituted derivatives thereof
- Patent number 3,950,438
- Issue date Apr 13, 1976
- Stamicarbon B.V.
- Sijbrandus E. Schaafsma
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Preparation of cyclohexane-1,3-dione and of alkyl-substituted deriv...
- Patent number 3,932,511
- Issue date Jan 13, 1976
- Stamicarbon B.V.
- Sijbrandus E. Schaafsma
- C07 - ORGANIC CHEMISTRY