US2191346A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric lamp or similar device and method of manufacture
Assignee: General Electric Co
•
Filing: 1937-04-30
•
Granted: 1940-02-20
•
Expires: 1957-04-30
Abstract
No abstract record available.
Inventors
- 👤 Greiner Alfred
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 13:11
CPC Classifications
H; H01; H01K; H01K5/00; H01K5/02; H01J; H01J5/00; H01J5/32; H01J5/40; H01J5/42; H01J5/44; H01K1/00; H01K1/42; H01K1/44; H01K3/00; H01K3/20; H01J2893/00; H01J2893/0033; H01J2893/0034; H01J2893/0036
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) | 1943-02-19 | 1943-08-21 | 1944-02-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1947-02-19 | 1947-08-21 | 1948-02-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1951-02-19 | 1951-08-21 | 1952-02-20 | $7700.00 | Window Closed / Lapsed |