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:
Jun. 24, 1980
Filed:
Apr. 17, 1978
Applicant:
Inventor:
Walton J Hammar, Saint Paul, MN (US);
Assignee:
Riker Laboratories, Inc., Northridge, CA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07C / ;
U.S. Cl.
CPC ...
560 48 ; 562463 ;
Abstract
The maleic acid adduct of anthracene is used as a starting material for 11-amino-12-carboalkoxy-9,10-dihydro-9,10-ethanoanthracene, which through reaction with nitrous acid in a protic solvent provides an 11-substituted-12-carboalkoxy-10,11-dihydro-5,10-methano-5H-dibenzo[a,d]cy cloheptene which is then converted into the useful intermediate 12-carboxy-10,11-dihydro-5,10-methano-5H-dibenzo[a,d]cycloheptene.