US2733375A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Seal and terminal structure for electric discharge lamp
Assignee: —
•
Filing: —
•
Granted: 1956-01-31
•
Expires: 1973-01-31
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 21:40
CPC Classifications
H; H01; H01J; H01J5/00; H01J5/50; H01J5/54; H01J61/00; H01J61/02; H01J61/36; H01J61/366
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
148 words
A GASEOUS ELECTRIC DISCHARGE LAMP COMPRISING AN ELONGATED TUBULAR GLASS ENVELOPE CONTAINING AN IONIZABLE GASEOUS ATMOSPHERE, A TERMINAL STRUCTURE CLOSING AND SEALING EACH END OF SAID ENVELOPE AND COMPRISING A DISC OF METAL HAVING A COEFFICIENT OF EXPANSION CLOSELY APPROXIMATING THAT OF THE GLASS ENVELOPE, EACH OF SAID DICS HAVING A SURFACE PORTION THEREOF FUSION-SEALED DIRECTLY TO THE ASSOCIATED END OF THE ENVELOPE, A METAL TERMINAL CONDUCTOR EXTENDING INTO SAID ENVELOPE THROUGH A CENTRAL APERTURE IN EACH DISC AND BEING HERMETICALLY SEALED THERETO AROUND THE APERTURE BY METALLIC BRAZING MATERIAL, ONE OF SAID CONDUCTORS BEING HOLLOW IN ORDER TO SERVE AS AN EXHAUST TUBE AND HAVING ITS WALLS HERMETICALLY CLOSED EXTERIORLY OF THE ENVELOPE, THE INNER END OF SAID HOLLOW TUBE CONDUCTOR WITHIN THE ENVELOPE FORMING AN INTEGRAL PART OF A METAL ANODE MEMBER, AND THE INNER END OF THE OTHER TERMINAL CONDUCTOR CARRYING A METALLIC CATHODE MEMBER.
Claim 2
Dependent Claim
148 words
A GASEOUS ELECTRIC DISCHARGE LAMP COMPRISING AN ELONGATED TUBULAR GLASS ENVELOPE CONTAINING AN IONIZABLE GASEOUS ATMOSPHERE, A TERMINAL STRUCTURE CLOSING AND SEALING EACH END OF SAID ENVELOPE AND COMPRISING A DISC OF METAL HAVING A COEFFICIENT OF EXPANSION CLOSELY APPROXIMATING THAT OF THE GLASS ENVELOPE, EACH OF SAID DICS HAVING A SURFACE PORTION THEREOF FUSION-SEALED DIRECTLY TO THE ASSOCIATED END OF THE ENVELOPE, A METAL TERMINAL CONDUCTOR EXTENDING INTO SAID ENVELOPE THROUGH A CENTRAL APERTURE IN EACH DISC AND BEING HERMETICALLY SEALED THERETO AROUND THE APERTURE BY METALLIC BRAZING MATERIAL, ONE OF SAID CONDUCTORS BEING HOLLOW IN ORDER TO SERVE AS AN EXHAUST TUBE AND HAVING ITS WALLS HERMETICALLY CLOSED EXTERIORLY OF THE ENVELOPE, THE INNER END OF SAID HOLLOW TUBE CONDUCTOR WITHIN THE ENVELOPE FORMING AN INTEGRAL PART OF A METAL ANODE MEMBER, AND THE INNER END OF THE OTHER TERMINAL CONDUCTOR CARRYING A METALLIC CATHODE MEMBER.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-01-30 | 1959-08-01 | 1960-01-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-01-30 | 1963-08-01 | 1964-01-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-01-30 | 1967-08-01 | 1968-01-31 | $7700.00 | Window Closed / Lapsed |