IP Library › Granted Patent US 4,999,165
Granted Patent Utility
US 4,999,165 · App. 07/428,194

Pressure vessel with improved gasket valve

Inventors: Daniel Calabra, Charles O. Hancock, Brian Avant
Patented Case View Patent ↗
Granted: Mar 12, 1991 Filed: Oct 27, 1989
Inventors
Daniel Calabra
Charles O. Hancock
Brian Avant
Assignee (at issue)
MDT CO.,LTD.

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 4,999,165
App. No.
07/428,194
Filed
1989-10-27
Granted
1991-03-12
Kind
A