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:
Jan. 30, 2001
Filed:
Feb. 04, 1999
Mika Timmerbacka, Veikkola, FI;
Jorma Lehtonen, Kuohu, FI;
Veli Pekka Tanninen, Espoo, FI;
Esa Muttonen, Helsinki, FI;
Jukka Kaukonen, Helsinki, FI;
Riikka Hyppöl{umlaut over (a)}, Espoo, FI;
Reijo B{umlaut over (a)}ckström, Helsinki, FI;
Orion Corporation, Espoo, FI;
Abstract
The present invention relates to a method for preparing optically active enantiomers of [[4-(1,4,5,6-tetrahydro-4-methyl-6-oxo-3-pyridazinyl)phenyl]-hydrazono]propanedinitrile (I), particularly (−) enantiomer of (I). Furthermore, the invention relates to a novel crystalline polymorphic form of the (−) enantiomer.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile