Patent Leaderboard
USPTO Patent Rankings Data through Dec 31, 2025
Home › Process for the preparation of cis-(.+-.)-3,4-dihydro-N,N,2-trimethyl-2H-1-benzopyran-3-amine and intermediates produced thereby

Process for the preparation of cis-(.+-.)-3,4-dihydro-N,N,2-trimethyl-2H-1-benzopyran-3-amine and intermediates produced thereby

US Patent 4203895 · Granted May 20, 1980

Estimated economic value: $9,514,000 ⓘ

Assignee

Inventors

View full patent text on Google Patents →

More Patents by These Inventors

N-(2,6-disubstituted aromatic)-N'-pyridinyl ureas1990
Anticonvulsant N-(2,6-disubstituted aromatic)-n'-pyridinyl ureas1986
5-Amino-N-(3-chloro- 2-methyl-, or 2-fluorophenyl)-1,3-dimethyl-1H-pyrazole-4-ca1984
4-Lower alkyl-3-phenoxypyridine-1-oxide and a method for its production1983
Method for treating convulsions with pyrazole-4-carboxamide derivatives1982