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US2848642A
Expired / Lapsed
US
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Filament mounting
Assignee: Westinghouse Electric Corp
•
Filing: 1954-11-19
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Granted: 1958-08-19
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Expires: 1974-11-19
Abstract
No abstract record available.
Inventors
- 👤 Alvin A Wisco
- 👤 Stanley L Sweatt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 19:45
CPC Classifications
H; H01; H01K; H01K1/00; H01K1/02; H01K1/16
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1637034A
Cited
US2123015A
Cited
US2329118A
Cited
US2366292A
Cited
US2465106A
Cited
US2424518A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-08-18 | 1962-02-17 | 1962-08-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-08-18 | 1966-02-17 | 1966-08-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-08-18 | 1970-02-17 | 1970-08-19 | $7700.00 | Window Closed / Lapsed |