IP Library › Granted Patent US 5,286,419
Granted Patent Utility
US 5,286,419 · App. 07/839,146

Process for making a light polarizing spectacle lens

Inventors: Raoul F. van Ligten, Mark G. Asmus
Patented Case View Patent ↗
Granted: Feb 15, 1994 Filed: Feb 20, 1992
Inventors
Raoul F. van Ligten
Mark G. Asmus
Assignee (at issue)
BMC Industries, 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 5,286,419
App. No.
07/839,146
Filed
1992-02-20
Granted
1994-02-15
Kind
A