US2156988A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric lamp and similar device
Assignee: General Electric Co
•
Filing: 1938-02-04
•
Granted: 1939-05-02
•
Expires: 1958-02-04
Abstract
No abstract record available.
Inventors
- 👤 Jancke Hans
- 👤 Reger Martin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 14:40
CPC Classifications
H; H01; H01K; H01K1/00; H01K1/42; H01K1/46; C; C04; C04B; C04B37/00; C04B37/02; C04B37/023; C04B37/025; C04B37/04; C04B37/045; H01J; H01J5/00; H01J5/32; C04B2237/00; C04B2237/02; C04B2237/10; C04B2237/30; C04B2237/32; C04B2237/34; C04B2237/345; C04B2237/346; C04B2237/40; C04B2237/50; C04B2237/80
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) | 1942-05-01 | 1942-10-31 | 1943-05-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1946-05-01 | 1946-10-31 | 1947-05-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1950-05-01 | 1950-10-31 | 1951-05-02 | $7700.00 | Window Closed / Lapsed |