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US2722668A
Expired / Lapsed
US
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Electric lamp
Assignee: General Electric Canada Co
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Filing: 1952-09-06
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Granted: 1955-11-01
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Expires: 1972-09-06
Abstract
No abstract record available.
Inventors
- 👤 Wellington Harold Stanley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 20:57
CPC Classifications
H; H01; H01J; H01J5/00; H01J5/50; H01J5/54; H01J5/56
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1374349A
Cited
GB178763A
Cited
US1871668A
Cited
US1987427A
Cited
US2192943A
Cited
US2372266A
Cited
GB571000A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-10-31 | 1959-05-02 | 1959-11-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-10-31 | 1963-05-02 | 1963-11-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-10-31 | 1967-05-02 | 1967-11-01 | $7700.00 | Window Closed / Lapsed |