Patent US2089053A successfully refreshed from Google Patents.
US2089053A
Expired / Lapsed
US
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Apparatus for testing lamps
Assignee: General Electric Co
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Filing: 1934-12-12
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Granted: 1937-08-03
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Expires: 1954-12-12
Abstract
No abstract record available.
Inventors
- 👤 John F Donovan
- 👤 Illingworth George
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 07:44
CPC Classifications
H; H01; H01J; H01J9/00; H01J9/38; H01J9/385; H01J9/42
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1940-08-02 | 1941-02-01 | 1941-08-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1944-08-02 | 1945-02-01 | 1945-08-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1948-08-02 | 1949-02-01 | 1949-08-03 | $7700.00 | Window Closed / Lapsed |