US2182904A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Incandescent lamp
Assignee: Individual
•
Filing: 1937-06-18
•
Granted: 1939-12-12
•
Expires: 1957-06-18
Abstract
No abstract record available.
Inventors
- 👤 Rover Wilhelm
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:43
CPC Classifications
H; H01; H01K; H01K1/00; H01K1/02; H01K1/14; F; F21; F21V; F21V11/00
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) | 1942-12-11 | 1943-06-12 | 1943-12-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1946-12-11 | 1947-06-12 | 1947-12-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1950-12-11 | 1951-06-12 | 1951-12-12 | $7700.00 | Window Closed / Lapsed |