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:
Dec. 16, 1980
Filed:
Aug. 01, 1979
Applicant:
Inventors:
Gunther Bernhardt, St. Augustin, DE;
Gerhard Daum, Cologne, DE;
Assignee:
Dynamit Nobel Aktiengesellschaft, Troisdorf, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07C / ;
U.S. Cl.
CPC ...
568431 ;
Abstract
A process for the preparation of a terephthalic, isophthalic or phthalic dialdehyde is described by dehydrogenation of the corresponding xylylene glycol in the vapor phase at 250.degree. to 500.degree. C. The process is carried out in the presence of oxygen, water vapor and a dehydrogenation catalyst, suitably a silver dehydrogenation catalyst.
Bernhardt, Gunther. (1980). Process for the preparation of terephthalic, isophthalic and phthalic (U.S. Patent No. 4239703). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/4239703
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile