US2006171A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lighting apparatus
Assignee: Individual
•
Filing: 1933-02-23
•
Granted: 1935-06-25
•
Expires: 1953-02-23
Abstract
No abstract record available.
Inventors
- 👤 Kalhaus Ernst
- 👤 John Edmond De Christmas Di De
- 👤 Valdemar De Christmas Dirc Hol
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 11:16
CPC Classifications
F; F21; F21K; F21K5/00; F21K5/02; F21K5/023
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) | 1938-06-24 | 1938-12-24 | 1939-06-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1942-06-24 | 1942-12-24 | 1943-06-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1946-06-24 | 1946-12-24 | 1947-06-25 | $7700.00 | Window Closed / Lapsed |