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The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.

The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.

Patent No.:

US 4093889 B1

PDFFull Text
Date of Patent:
Jun. 06, 1978

Filed:

Feb. 03, 1977

Low-pressure mercury vapor discharge lamp

Applicant:
Inventors:

Jan Bloem, Eindhoven, NL;

Albert Bouwknegt, Eindhoven, NL;

Assignee:

U.S. Philips Corporation, New York, NY (US);

Attorneys:

Trifari; Frank R.

Smith; Robert S.

Primary Examiner:

Rudolph V Rolinec

Assistant Examiner:

Darwin R Hostetter

Int. Cl.
CPC ...
H01J / ;
U.S. Cl.
CPC ...
313229 ; 313187 ; 313490 ;
Abstract

A low-pressure mercury vapor discharge lamp, having a discharge space containing thermally emitting electrodes and a mercury amalgam which is composed of mercury, bismuth, tin and lead. This amalgam causes the mercury vapor pressure to remain stable at the value of 6 .times. 10.sup.-3 torr which is the optimum value for the conversion of electric energy into ultraviolet radiation over a wide temperature range. In addition, the mercury vapor pressure at room temperature is still sufficiently high to ensure rapid starting.

Find Patent Forward Citations

Bloem, Jan. (1978). Low-pressure mercury vapor discharge lamp (U.S. Patent No. 4093889). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/4093889

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

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