US2501453A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Microphotographic projector and reader device with indexing means
Assignee: CINEX Inc
•
Filing: 1947-03-25
•
Granted: 1950-03-21
•
Expires: 1967-03-25
Abstract
No abstract record available.
Inventors
- 👤 Rowe Walter
- 👤 Cyrus M Adler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 06:36
CPC Classifications
G; G03; G03B; G03B21/00; G03B21/10; G03B21/11; G03B21/115
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1129693A
Cited
US1889575A
Cited
US1977475A
Cited
US2008982A
Cited
US2267649A
Cited
US2256178A
Cited
US2260551A
Cited
US2279463A
Cited
US2431662A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-03-20 | 1953-09-19 | 1954-03-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-03-20 | 1957-09-19 | 1958-03-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-03-20 | 1961-09-19 | 1962-03-21 | $7700.00 | Window Closed / Lapsed |