US2445656A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multiple filament electric lamp
Assignee: Individual
•
Filing: 1946-07-19
•
Granted: 1948-07-20
•
Expires: 1966-07-19
Abstract
No abstract record available.
Inventors
- 👤 Athanassiades John Emmanuel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 17:51
CPC Classifications
H; H01; H01J; H01J5/00; H01J5/50; H01J5/54; H01J5/62; H01K; H01K9/00; H01K9/08
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US319177A
Cited
US1551482A
Cited
US1818614A
Cited
GB386939A
Cited
DE589726C
Cited
DE657971C
Cited
US2084176A
Cited
US2269605A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-07-20 | 1952-01-19 | 1952-07-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-07-20 | 1956-01-19 | 1956-07-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-07-20 | 1960-01-19 | 1960-07-20 | $7700.00 | Window Closed / Lapsed |