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:
Nov. 07, 1989
Filed:
Jul. 01, 1985
Applicant:
Inventor:
Birger Johannessen, St. Paul, MN (US);
Assignee:
Minnesota Mining and Manufacturing Company, St. Paul, MN (US);
Primary Examiner:
Int. Cl.
CPC ...
C07C / ; C07C / ; C08G / ; C08G / ;
U.S. Cl.
CPC ...
568606 ; 25218227 ; 528403 ; 528409 ; 528421 ; 568607 ; 568614 ; 568618 ; 568620 ;
Abstract
Hydroxyl terminated polyepichlorohydrin having a polydispersity of less than 1.2 and a molecular weight of at least 2000, and method of preparation using stannic chloride and strong carboxylic acid co-catalysts.