IP Library › Granted Patent US 4,851,506
Granted Patent Utility
US 4,851,506 · App. 07/135,813

Photostructurable polyimide mixtures

Inventors: Ottmar Rohde, Andre Perret, Josef Pfeifer
Patented Case View Patent ↗
Granted: Jul 25, 1989 Filed: Dec 21, 1987
Inventors
Ottmar Rohde
Andre Perret
Josef Pfeifer
Assignee (at issue)
Ciba-Geigy

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 4,851,506
App. No.
07/135,813
Filed
1987-12-21
Granted
1989-07-25
Kind
A