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:
Jun. 01, 1976
Filed:
Mar. 05, 1974
Louis Selig Harris, Richmond, VA (US);
Harry George Pars, Lexington, MA (US);
Raj Kumar Razdan, Belmont, MA (US);
John Clark Sheehan, Lexington, MA (US);
Sharps Associates, Cambridge, MA (US);
Abstract
Novel thienobenzopyran and thiopyranobenzopyran esters represented by the formula ##SPC1## Wherein n is 0 to 3 and m is 0 to 3 and m + n = 2 or 3, R.sub.1 is lower alkyl, R.sub.2 is alkyl or cycloalkyl-lower alkyl, R.sub.4 is hydrogen or lower alkyl, R.sub.5 is hydrogen or lower alkyl, and R.sub.3 is ##EQU1## wherein Y is a straight or branched chain C.sub.1 to C.sub.8 alkylene, R.sub.6 is hydrogen or a lower alkyl, a is an integer from 1 to 4, b is an integer from 1 to 4, X is CH.sub.2, O, S or NR.sub.7 wherein R.sub.7 is hydrogen or lower alkyl, with the limitation that when X is O, S or NR.sub.7, a and b each must be 2; and the acid addition salts thereof.