IP Library › Granted Patent US 5,352,781
Granted Patent Utility
US 5,352,781 · App. 08/035,141

Process for precursors to calcitriol and related compounds

Inventors: George Petros Yiannikouros, Percy Sarwood Manchand
Patented Case View Patent ↗
Granted: Oct 4, 1994 Filed: Mar 19, 1993
Inventors
George Petros Yiannikouros
Percy Sarwood Manchand
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.

Order Certified Copies
Most orders are placed with the USPTO same day — all within 24 business hours.
Order via The Patent Place →
Pre-filled with this patent's details
Quick Facts
Patent No.
US 5,352,781
App. No.
08/035,141
Filed
1993-03-19
Granted
1994-10-04
Kind
A