Patent Leaderboard
USPTO Patent Rankings Data through Dec 31, 2025
Home › Spiro-pyranic compounds endowed with photochromic characteristics

Spiro-pyranic compounds endowed with photochromic characteristics

US Patent 5532361 · Granted Jul 2, 1996

Assignee

Inventors

View full patent text on Google Patents →

More Patents by These Inventors

Semisynthetic process for the preparation of colchicine2025
Process for the synthesis of melphalan2024
Process for the synthesis of Melphalan2023
Process for the preparation of Lenvatinib2022
Crystal forms of lenvatinib2020
Solid forms of ingenol 3-(3,5-diethylisoxazole-4-carboxylate) and method for pre2020
Antimuscarinic compound having a low content of impurities2017
Crystalline forms of an antidepressant compound2017
Process for the preparation of an antidepressant and the intermediates thereof2017
Process for the purification of 2-phenyl-2-methyl-propanoic acid derivatives2016
Process for the preparation of sulfonamide compounds2015
Process for the preparation of pteridine derivatives2014