US2897345A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric lamp
Assignee: Individual
•
Filing: 1957-04-22
•
Granted: 1959-07-28
•
Expires: 1977-04-22
Abstract
No abstract record available.
Inventors
- 👤 Meager Vernon Walter
- 👤 Barker Stuart Netherwood
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 06:06
CPC Classifications
F; F21; F21V; F21V31/00; F21L; F21L4/00; F21V23/00; F21V23/04; F21V23/0414; F21V14/00; F21V14/04; F21V14/045; F21V25/00; F21V25/12
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1342322A
Cited
US2234972A
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US2204136A
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US2272907A
Cited
US2367888A
Cited
US2427017A
Cited
US2483665A
Cited
US2518437A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-07-27 | 1963-01-26 | 1963-07-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-07-27 | 1967-01-26 | 1967-07-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-07-27 | 1971-01-26 | 1971-07-28 | $7700.00 | Window Closed / Lapsed |