The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 06, 1977
Filed:
Feb. 12, 1976
Friedrich Asinger, Rott, DT;
Wolf-Dieter Pfeifer, Grossauheim, DT;
Heribert Offermanns, Grossauheim, DT;
Paul Scherberich, Neu Isenburg, DT;
Gerd Schreyer, Grossauheim, DT;
Deutsche Gold- und Silber-Scheideanstalt vormals Roessler, Frankfurt, DT;
Abstract
Penicillamine or a homolog thereof is obtained by reacting a 2-disubstituted-5,5-alkyl-thiazolidine nitrile, alkyl having 1 to 6 carbon atoms, with a mineral acid in a two-stage proceeding wherein in the first stage relatively low temperatures and a relatively high concentration of the mineral acid are employed while in the second stage the concentration of the acid is relatively low and the temperatures are relatively high, the term 'relatively' referring to the relationship of said two stages of the reaction with mineral acid.