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:
May. 08, 2007
Filed:
Jul. 20, 2004
Thomas R. Welter, Webster, NY (US);
Thomas R. Welter, Webster, NY (US);
Eastman Kodak Company, Rochester, NY (US);
Abstract
The present invention relates to a method for the chemical separation of the enantiomers of 1,1'-spirobiindane-6,6′-diol derivatives comprising providing a racemic chiral 1,1′-spirobiindane-6,6′-diol derivative, reacting a nonracemic chiral component with the racemic chiral 1,1′-spirobiindane-6,6′-diol derivative to afford a mixture of diastereomeric diesters, separating the mixture of diastereomeric diesters to provide a substantially pure individual diastereomeric diester, and chemically removing the ester groups from the substantially pure individual diastereomeric diester to provide a nonracemic chiral 1,1′-spirobiindane-6,6′-diol derivative.