US2472931A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flow camera document-copying machine
Assignee: MICROSTAT Corp
•
Filing: 1945-01-11
•
Granted: 1949-06-14
•
Expires: 1965-01-11
Abstract
No abstract record available.
Inventors
- 👤 Fred C Yohn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 10:50
CPC Classifications
G; G03; G03B; G03B27/00; G03B27/32; G03B27/50
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1032378A
Cited
US1344896A
Cited
US1957889A
Cited
US1966348A
Cited
US2016611A
Cited
US2058415A
Cited
US2177135A
Cited
US2129326A
Cited
US2165418A
Cited
US2209342A
Cited
US2161391A
Cited
US2194808A
Cited
US2357674A
Cited
US2234717A
Cited
US2298422A
Cited
US2253052A
Cited
GB546257A
Cited
US2265975A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-06-13 | 1952-12-13 | 1953-06-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-06-13 | 1956-12-13 | 1957-06-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-06-13 | 1960-12-13 | 1961-06-14 | $7700.00 | Window Closed / Lapsed |