US1657060A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Incandescent electric lamp and method of producing the same
Assignee: Individual
•
Filing: 1925-01-30
•
Granted: 1928-01-24
•
Expires: 1945-01-30
Abstract
No abstract record available.
Inventors
- 👤 Alan L Becket
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 14:57
CPC Classifications
H; H01; H01K; H01K3/00; H01K1/00; H01K1/26
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) | 1931-01-23 | 1931-07-25 | 1932-01-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1935-01-23 | 1935-07-25 | 1936-01-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1939-01-23 | 1939-07-25 | 1940-01-24 | $7700.00 | Window Closed / Lapsed |