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.:
Date of Patent:
Mar. 31, 1992
Filed:
Sep. 26, 1990
Applicant:
Inventors:
Harold L Rothwell, Jr, Georgetown, MA (US);
Betina Desmarais, Exeter, NH (US);
Assignee:
GTE Products Corporation, Danvers, MA (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01J / ; H01J / ; H01J / ;
U.S. Cl.
CPC ...
313 44 ; 313 25 ; 313634 ;
Abstract
A low wattage metal halide capsule shape having a cylindrical shape geometry with asymmetrical regions behind the anode and cathode for direct current operation is disclosed. The disclosure concerns several arc tube geometries to encourage internal convective flow in small, direct current arc discharge lamps.