IP Library › Granted Patent US 4,499,268
Granted Patent Utility
US 4,499,268 · App. 06/466,454

Process for the preparation of isomelamines

Inventors: Friedrich Lohse, Helmut Zondler
Patented Case View Patent ↗
Granted: Feb 12, 1985 Filed: Feb 15, 1983
Inventors
Friedrich Lohse
Helmut Zondler
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 4,499,268
App. No.
06/466,454
Filed
1983-02-15
Granted
1985-02-12
Kind
A