US2980820A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Filament support for an electric lamp or similar device
Assignee: Westinghouse Electric Corp
•
Filing: 1959-12-24
•
Granted: 1961-04-18
•
Expires: 1979-12-24
Abstract
No abstract record available.
Inventors
- 👤 William L Brundige
- 👤 Raymond M Kane
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 21:09
CPC Classifications
H; H01; H01K; H01K1/00; H01K1/18; H01K1/24
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2042540A
Cited
US2813993A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-04-17 | 1964-10-17 | 1965-04-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-04-17 | 1968-10-17 | 1969-04-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-04-17 | 1972-10-17 | 1973-04-18 | $7700.00 | Window Closed / Lapsed |