US2553745A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for projecting images
Assignee: Individual
•
Filing: 1946-02-18
•
Granted: 1951-05-22
•
Expires: 1966-02-18
Abstract
No abstract record available.
Inventors
- 👤 Ralph E Brown
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 06:17
CPC Classifications
G; G03; G03B; G03B21/00; G03B21/14; G03B21/147
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2420316A
Cited
US1408222A
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US1635795A
Cited
US1651574A
Cited
US1619096A
Cited
US2077111A
Cited
US2072286A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-05-21 | 1954-11-20 | 1955-05-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-05-21 | 1958-11-20 | 1959-05-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-05-21 | 1962-11-20 | 1963-05-22 | $7700.00 | Window Closed / Lapsed |