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:
Jul. 14, 1992
Filed:
Dec. 19, 1990
Applicant:
Inventors:
Eckhard Hickmann, Dannstadt-Schauernheim, DE;
Ulrich Koehler, Heidelberg, DE;
Hardo Siegel, Speyer, DE;
Assignee:
BASF Aktiengesellschaft, Ludwigshafen, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07C / ;
U.S. Cl.
CPC ...
558268 ; 558269 ; 558271 ; 558272 ; 558413 ; 558415 ; 558416 ; 558417 ; 558418 ; 558419 ; 558420 ; 558421 ; 558422 ; 558423 ; 558424 ; 560-8 ; 560 14 ; 560 21 ; 560 25 ; 560 22 ; 560 42 ; 560 45 ; 560 46 ; 560 53 ; 560 64 ; 560 65 ; 560 67 ; 560 70 ; 560 76 ; 560 83 ; 560301 ; 560358 ; 560359 ; 560360 ; 562 46 ; 562 47 ; 562 58 ; 562 66 ; 562 67 ; 562 73 ; 562 76 ; 562840 ; 562853 ; 564157 ; 564158 ; 564221 ; 564384 ; 564388 ; 564389 ; 564441 ; 564442 ;
Abstract
Polytetrahydrofuran derivatives of the general formula ##STR1## where n is from 2 to 70, X is the bridge member --NH-- or --O-- and R.sup.1 and R.sup.4 are each hydrogen or various radicals.