IP Library › Granted Patent US 5,997,257
Granted Patent Utility
US 5,997,257 · App. 09/009,792

Refrigerant compressor

Inventors: Hiroyuki Ishida, Kazuo Eitai, Minoru Kanaizuka
Patented Case View Patent ↗
Granted: Dec 7, 1999 Filed: Jan 20, 1998
Inventors
Hiroyuki Ishida
Kazuo Eitai
Minoru Kanaizuka
Assignee (at issue)
Zexel GmbH

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 5,997,257
App. No.
09/009,792
Filed
1998-01-20
Granted
1999-12-07
Kind
A