Patent US2148794A successfully refreshed from Google Patents.
US2148794A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Light projector fop strcboscopic and otheh purposes
Assignee: —
•
Filing: —
•
Granted: 1939-02-28
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Expires: 1956-02-28
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:44
CPC Classifications
G; G01; G01P; G01P3/00; G01P3/36; G01P3/40; Y; Y10; Y10T; Y10T74/00; Y10T74/19; Y10T74/19219; Y10T74/19293; Y10T74/19298; Y10T74/19316
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) | 1942-02-27 | 1942-08-29 | 1943-02-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1946-02-27 | 1946-08-29 | 1947-02-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1950-02-27 | 1950-08-29 | 1951-02-28 | $7700.00 | Window Closed / Lapsed |