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 6890236 B1

Expired

Date of Patent:

May. 10, 2005

Filed:

Dec. 05, 2002

Producing high pressure discharge lamp of plural glass members having different softening points producing high pressure

Applicants:

Shinichiro Hataoka, Osaka, JP;

Kiyoshi Takahashi, Kyoto, JP;

Yuriko Kaneko, Nara, JP;

Makoto Horiuchi, Nara, JP;

Makoto Kai, Osaka, JP;

Tsuyoshi Ichibakase, Osaka, JP;

Tomoyuki Seki, Osaka, JP;

Inventors:

Shinichiro Hataoka, Osaka, JP;

Kiyoshi Takahashi, Kyoto, JP;

Yuriko Kaneko, Nara, JP;

Makoto Horiuchi, Nara, JP;

Makoto Kai, Osaka, JP;

Tsuyoshi Ichibakase, Osaka, JP;

Tomoyuki Seki, Osaka, JP;

Assignee:

Matsushita Electric Industrial Co., Ltd., Osaka, JP;

Attorney:

Harness, Dickey & Pierce, P.L.C.

Primary Examiner:

Joseph Williams

Int. Cl.

CPC ...

H05B033/10 ;

U.S. Cl.

CPC ...

Abstract

A method for producing a high pressure discharge lamp including a luminous bulb enclosing a luminous substance inside and a sealing portion for retaining airtightness of the luminous bulb, includes preparing a glass pipe for a discharge lamp including a luminous bulb portion that will be formed into a luminous bulb of a high pressure discharge lamp and a side tube portion extending from the luminous bulb portion; inserting a glass member constituted by a second glass having a softening point lower than that of a first glass constituting the side tube portion into the side tube portion, and then heating the side tube portion so as to attach the glass member and the side tube portion; and after the attachment step, heating a portion including at least the glass member and the side tube portion at a temperature higher than a strain point temperature of the second glass and lower than a strain point temperature of the first glass.

Find Patent Forward Citations

Hataoka, Shinichiro. (2005). Producing high pressure discharge lamp of plural glass members having different softening points producing high pressure (U.S. Patent No. 6890236). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/6890236

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