Granted Patent
Utility
US 4,777,272 · App. 07/119,876
Intermediates for substituted 4-benzoyl-3,5-dioxotetrahydropyrans and thiopyrans
Inventors:
Charles G. Carter, Jeff K. Curtis
Patented Case
View Patent ↗
Granted: Oct 11, 1988
Filed: Nov 13, 1987
Inventors
Charles G. Carter
Jeff K. Curtis
Assignee (at issue)
Stauffer Chemical Company
This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.