US2551954A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lighting device having a lens which gives a long and relatively narrow area of illumination
Assignee: Individual
•
Filing: 1947-02-21
•
Granted: 1951-05-08
•
Expires: 1967-02-21
Abstract
No abstract record available.
Inventors
- 👤 John L Lehman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 16:07
CPC Classifications
F; F21; F21V; F21V5/00; F21V5/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1345073A
Cited
US1399749A
Cited
US1402816A
Cited
US1457980A
Cited
US1788936A
Cited
US2308100A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-05-07 | 1954-11-06 | 1955-05-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-05-07 | 1958-11-06 | 1959-05-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-05-07 | 1962-11-06 | 1963-05-08 | $7700.00 | Window Closed / Lapsed |