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:
Oct. 31, 1989
Filed:
Oct. 17, 1988
Applicant:
Inventors:
Michael F Farona, Cuyahoga Falls, OH (US);
Ramji Srinivasan, Akron, OH (US);
Assignee:
University of Akron, Akron, OH (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07C / ;
U.S. Cl.
CPC ...
585416 ; 585 27 ;
Abstract
A method of cyclization of .alpha.,.omega.-diynes with a transition metal catalyst such as niobium or tantalum salts such as halogen to yield products such as dimers trimers and higher polymers which may have benzo cyclobutene groups, benzocyclopentene groups, benzocyclohexene groups, or none of these, depending on the size of n in the .alpha.,.omega.-diynes of the formula of page 1.