Granted Patent
Utility
US 4,661,641 · App. 06/614,607
Substituted alkynes useful as intermediates in the synthesis of carotenoids
Inventors:
Teodor Lukac, Milan Soukup, Erich Widmer
Patented Case
View Patent ↗
Granted: Apr 28, 1987
Filed: May 29, 1984
Inventors
Teodor Lukac
Milan Soukup
Erich Widmer
Assignee (at issue)
HOFFMANN-LA ROCHE INC.
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.