IP Library › Granted Patent US 4,547,977
Granted Patent Utility
US 4,547,977 · App. 06/612,328

Freeze dryer with improved temperature control

Inventors: Kenneth J. Tenedini, David T. Sutherland
Patented Case View Patent ↗
Granted: Oct 22, 1985 Filed: May 21, 1984
Inventors
Kenneth J. Tenedini
David T. Sutherland
Assignee (at issue)
The VirTis Company, 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 4,547,977
App. No.
06/612,328
Filed
1984-05-21
Granted
1985-10-22
Kind
A