Patent Leaderboard
USPTO Patent Rankings Data through Dec 31, 2025
Home › Process for preparing polycarbonates

Process for preparing polycarbonates

US Patent 4330481 · Granted May 18, 1982

Estimated economic value: $3,020,000 ⓘ

Assignee

Inventors

View full patent text on Google Patents →

More Patents by These Inventors

Removal of hydrogen sulfide and/or mercaptans from oil or oil derivatives and tr2024
Stabilizers for polymer/polyols1991
Stabilizers for polymer/polyols1990
Polycarbonate type nonionic surfactants1983
Polycarbonate type nonionic surfactants1983
Polycarbonate type nonionic surfactants1983
Preparation of 2-oxazolidinone and ethyleneurea1983
Preparation of organic isocyanates1981
Production of monoalkyleneglycols, monoalkanolamines and alkylenediamine1981
Actinide sulfite tetrahydrate and actinide oxysulfite tetrahydrate1980