IP Library › Granted Patent US 4,570,021
Granted Patent Utility
US 4,570,021 · App. 06/715,883

Preparation of ketones

Inventors: Richard L. Cryberg, Russell M. Bimber
Patented Case View Patent ↗
Granted: Feb 11, 1986 Filed: Mar 25, 1985
Inventors
Richard L. Cryberg
Russell M. Bimber
Assignee (at issue)
SDS Biotech Kabushiki Kaisha

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 4,570,021
App. No.
06/715,883
Filed
1985-03-25
Granted
1986-02-11
Kind
A