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. 02, 1990
Filed:
May. 09, 1989
Applicant:
Inventors:
Grace Y Lo, Midland, MI (US);
Eric W Otterbacher, Midland, MI (US);
Massimo D Bezoari, Baton Rouge, LA (US);
Brian W Walther, Baton Rouge, LA (US);
Assignee:
The Dow Chemical Company, Midland, MI (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C08F / ; C08F / ; B01J / ;
U.S. Cl.
CPC ...
526175 ; 526 77 ; 526180 ; 526335 ; 526340 ; 5263402 ; 526346 ; 525250 ; 525314 ; 502155 ;
Abstract
Narrow molecular weight telechelic and/or block copolymers are prepared by anionic polymerization using an initiator composition comprising a multifunctional lithium initiator in combination with an organic diamine or triamine and optionally a metal alkoxide.