IP Library › Granted Patent US 5,188,957
Granted Patent Utility
US 5,188,957 · App. 07/661,396

Lambda packaging extract lacking beta-galactosidase activity

Inventors: Jay M. Short, Patricia L. Kretz
Patented Case View Patent ↗
Granted: Feb 23, 1993 Filed: Feb 26, 1991
Inventors
Jay M. Short
Patricia L. Kretz
Assignee (at issue)
STRATAGEN

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 5,188,957
App. No.
07/661,396
Filed
1991-02-26
Granted
1993-02-23
Kind
A