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:
Sep. 21, 1999
Filed:
Aug. 05, 1998
Applicant:
Inventors:
Franciscus Theodorus Brands, Za Haren, NL;
Pieter Vrijhof, BX Berghem, NL;
Assignee:
Akzo Nobel, N.V., Arnhem, NL;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C07J / ;
U.S. Cl.
CPC ...
552648 ; 552539 ;
Abstract
The invention relates to a method for the preparation of a compound of formula II: ##STR1## wherein a compound of formula V: ##STR2## is condensed with a compound of the formula CH.sub.3 -C(OR.sub.4 O)-(CH.sub.2).sub.3 -XHal and R.sub.1, R.sub.2, R.sub.3, R.sub.4, X and Hal are as defined by the specification.
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Brands, Franciscus. (1999). Method for the preparation of steroid derivative ketal (U.S. Patent No. 5955622). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/5955622
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