IP Library Granted Patent US 4,300,835
Granted Patent Utility
US 4,300,835 · App. 06/146,728

Attenuator for stray light produced in monochromators

Inventors: Dieter Schiemann, Wolfgang Witte
Patented Case View Patent ↗
Granted: Nov 17, 1981 Filed: May 2, 1980
Inventors
Dieter Schiemann
Wolfgang Witte
Assignee (at issue)
Bodenseewerk Perkin-Elmer 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 4,300,835
App. No.
06/146,728
Filed
1980-05-02
Granted
1981-11-17
Kind
A