Patent US2457487A successfully refreshed from Google Patents.
US2457487A
Expired / Lapsed
US
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Glow relay
Assignee: GTE Sylvania Inc
•
Filing: 1945-10-17
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Granted: 1948-12-28
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Expires: 1965-10-17
Abstract
No abstract record available.
Inventors
- 👤 Arnold L Peacock
- 👤 Bergitte A Jensen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 12:31
CPC Classifications
H; H05; H05B; H05B41/00; H05B41/02; H05B41/04; H05B41/06; H05B41/08
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1855760A
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US1813571A
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US2029144A
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US2056604A
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US2259144A
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US2324907A
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US2332809A
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US2329134A
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US2292050A
Cited
US2362468A
Cited
US2321910A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-12-28 | 1952-06-28 | 1952-12-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-12-28 | 1956-06-28 | 1956-12-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-12-28 | 1960-06-28 | 1960-12-28 | $7700.00 | Window Closed / Lapsed |