IP Library › Granted Patent US 5,505,884
Granted Patent Utility
US 5,505,884 · App. 08/440,712

Contact lenses and materials and methods of making same

Inventors: William J. Burke, Lisa A. Folk, Donald J. Ratkowski
Patented Case View Patent ↗
Granted: Apr 9, 1996 Filed: May 15, 1995
Inventors
William J. Burke
Lisa A. Folk
Donald J. Ratkowski
Assignee (at issue)
Pilkington Barnes Hind, 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 5,505,884
App. No.
08/440,712
Filed
1995-05-15
Granted
1996-04-09
Kind
A