Inventor · disambiguated record
Sijbrandus E. Schaafsma
Also filed as: SCHAAFSMA SIJBRANDUS E
6 granted patents·53 citations·filing 1974–1978
82Inventor score
Files withSTAMICARBON6
Top patents by PatentIndex Score
6 records- 0180US4012418AProcess for the preparation of pyrrolidone-2STAMICARBON·Filed 1975·Granted Mar 15, 1977·12 cites·6 claims
- 0280US3932511APreparation of cyclohexane-1,3-dione and of alkyl-substituted derivatives thereofSTAMICARBON·Filed 1974·Granted Jan 13, 1976·15 cites·10 claims
- 0374US4264501AProcess for the recovery of pyrrolidone-2STAMICARBON·Filed 1978·Granted Apr 28, 1981·8 cites·6 claims
- 0473US3950438APreparation of resorcinol and alkyl-substituted derivatives thereofSTAMICARBON·Filed 1974·Granted Apr 13, 1976·11 cites·11 claims
- 0564US4016175APreparation of a 2-amino-pyrroline derivativeSTAMICARBON·Filed 1975·Granted Apr 5, 1977·5 cites·9 claims
- 0637US4291170APreparation of delta-keto-estersSTAMICARBON·Filed 1977·Granted Sep 22, 1981·2 cites·9 claims
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