US3814973A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric lamps of the vibrating filament type having a conductive coating
Assignee: Duro Test Corp
•
Filing: 1972-09-05
•
Granted: 1974-06-04
•
Expires: 1992-09-05
Abstract
Abstract An incandescent lamp having a movable filament therein which is caused to oscillate in response to the field from a magnet in which at least a portion of the surface of the lamp envelope is coated with an electrically conductive material.
Inventors
- 👤 W Thouret
- 👤 R Kaufman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:43
CPC Classifications
H; H01; H01K; H01K1/00; H01K1/28; H01K1/32; H01K1/62
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
20 words
A lamp as in claim 1 wherein said electrically conductive coating is located on the inner wall of the bulb.
Claim 2
Dependent Claim
20 words
A lamp as in claim 1 wherein said electrically conductive coating is located on the outer wall of said bulb.
Claim 3
Dependent Claim
24 words
A lamp as in claim 1 wherein the electrically conductive coating is located on both the inner and the outer walls of the bulb.
Claim 4
Dependent Claim
22 words
A lamp as in claim 1 wherein the electrically conductive coating covers only a portion of the surface of the bulb wall.
Claim 5
Dependent Claim
17 words
A lamp as in claim 1 wherein said electrically conductive coating is arrayed in a predetermined pattern.
Claim 6
Dependent Claim
14 words
A lamp as in claim 1 wherein said electrically conductive coating is of metal.
References Cited (Backward Citations)
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Cited
US2079085A
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US2419177A
Cited
US2456474A
Cited
US2654042A
Cited
US2714683A
Cited
US3200280A
Cited
US3355617A
Cited
US3549946A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-06-03 | 1977-12-03 | 1978-06-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-06-03 | 1981-12-03 | 1982-06-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-06-03 | 1985-12-03 | 1986-06-04 | $7700.00 | Window Closed / Lapsed |