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. 27, 2012
Filed:
Aug. 20, 2009
Yoichi Mizukawa, Himeji, JP;
Kenji Tanino, Himeji, JP;
Yoichi Mizukawa, Himeji, JP;
Kenji Tanino, Himeji, JP;
Ushiodenki Kabushiki Kaisha, Tokyo, JP;
Abstract
A filament lamp has a bulb comprised of a straight light emitting tube from which a pair of flat hermetically sealed portions extend, a plurality of coiled filaments arranged within the light emitting tube, in the tube axis direction a pair of internal leads are connected to ends of the filament by a respective one of a plurality of metal foils that are embedded in the hermetically sealed portions, and external leads are connected to the metal foils. The width of metal foils embedded in the hermetically sealed portions is increased so as not to cause them to melt even when an electric current to be supplied to the filament lamp is increased, the hermetically sealed portions being made wider than the external diameter of the light emitting tube and the width between outer margins of the metal foils in a direction at right angles of the tube axis is greater than the internal diameter of the light emitting tube.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile