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:
Apr. 07, 1981
Filed:
Nov. 26, 1979
Applicant:
Inventors:
William J Schultz, St. Paul, MN (US);
Samuel Smith, St. Paul, MN (US);
Assignee:
Minnesota Mining and Manufacturing Company, St. Paul, MN (US);
Primary Examiner:
Int. Cl.
CPC ...
C08G / ; C08G / ;
U.S. Cl.
CPC ...
525334 ; 2603452 ; 2603 / ; 525332 ; 525387 ; 528417 ;
Abstract
Polymers that have a number average molecular weight of at least 1000 and that contains at least 5% by weight of segments that contain at least two consecutively recurring cyclic ether units wherein at least one of said tetrahydropyran 2,6-diyl unit of the formula ##STR1## and wherein the remainder of said cyclic ether units are selected from said tetrahydropyran 2,6-diyl units and tetrahydrofuran 2,5-diyl units of the formula ##STR2## wherein R.sup.1, R.sup.8, R.sup.9, R.sup.10, R.sup.11, R.sup.12, R.sup.13 and R.sup.14 are each selected from hydrogen and lower alkyl groups;