US4096405A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Elongated electric incandescent lamp
Assignee: Toshiba Corp
•
Filing: 1977-03-01
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Granted: 1978-06-20
•
Expires: 1997-03-01
Abstract
Abstract An elongated electric incandescent lamp having a closed envelope the inner diameter of which is less than 16mm and which is filled with an inert gas, a plurality of filaments suspended within the envelope and a getter disposed in the vicinity of each of the filaments.
Inventors
- 👤 Eizo Goto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 23:24
CPC Classifications
H; H01; H01K; H01K1/00; H01K1/50; H01K1/18
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
54 words
An elongated electric incandescent lamp comprising: an envelope having an inner diameter of less than 16 mm containing an inert filling gas; a plurality of filaments arranged serially in the envelope; and a plurality of getters, one getter disposed in the vicinity of each filament, to permit operation in any position without envelope blackening.
Claim 2
Dependent Claim
54 words
An elongated electric incandescent lamp comprising: an envelope having an inner diameter of less than 16 mm containing an inert filling gas; a plurality of filaments arranged serially in the envelope; and a plurality of getters, one getter disposed in the vicinity of each filament, to permit operation in any position without envelope blackening.
Claim 3
Dependent Claim
36 words
An elongated electric incandescent lamp according to claim 1 further comprising a supporting member for the filaments having anchor wires which support the filaments; and wherein one getter is disposed on each of the anchor wires.
Claim 4
Dependent Claim
21 words
An elongated electric incandescant lamp according to claim 2 wherein the plurality of filaments are discontinuously suspended by the supporting member.
References Cited (Backward Citations)
US3644773A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-06-19 | 1981-12-19 | 1982-06-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-06-19 | 1985-12-19 | 1986-06-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-06-19 | 1989-12-19 | 1990-06-20 | $7700.00 | Window Closed / Lapsed |