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. 27, 1981
Filed:
Jul. 31, 1979
Applicant:
Inventors:
Assignee:
Hoechst Aktiengesellschaft, , DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08K / ; C07D / ; C07D / ;
U.S. Cl.
CPC ...
260 / ; 546 19 ;
Abstract
The amide nitrogen of 9,9-dimethyl-2-oxa-4-oxo-3,8-diazaspiro-(4,5)-decane reacts with isocyanates or diisocyanates to give novel urea derivatives which can be used as light stabilizers for plastic materials.
Wiezer, Hartmut. (1981). Urea derivatives, process for their manufacture and their use as light (U.S. Patent No. 4247449). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/4247449
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile