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:
Oct. 11, 1988
Filed:
Mar. 05, 1987
Applicant:
Inventor:
Bauke J Roelevink, Weert, NL;
Assignee:
U.S. Philips Corporation, New York, NY (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
H01K / ;
U.S. Cl.
CPC ...
313111 ; 313113 ; 313315 ; 313116 ;
Abstract
The invention relates to a blown lamp bulb having a parabolically curved wall portion, a neck-shaped wall portion near the apex of the parabolically curved wall portion. The bulb has a an axis of symmetry and a largest diameter. A curved wall portion is opposite the parabolic wall portion and has a focus which is located near the neck-shaped wall portion. The curved wall portion has a spherically curved portion having a center of curvature on the largest diameter or above it and a flattened portion proximate the axis of symmetry. The lamp bulb renders it possible to manufacture, by the choice of the finish of the lamp bulb, a large number of lamp types.