US2703744A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotary card file
Assignee: Individual
•
Filing: 1951-04-28
•
Granted: 1955-03-08
•
Expires: 1971-04-28
Abstract
No abstract record available.
Inventors
- 👤 Abraham S Karper
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:51
CPC Classifications
B; B42; B42F; B42F17/00; B42F17/28
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2231029A
Cited
US2213825A
Cited
US2286911A
Cited
US2441717A
Cited
US2493167A
Cited
US2510924A
Cited
US2541185A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-03-07 | 1958-09-06 | 1959-03-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-03-07 | 1962-09-06 | 1963-03-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-03-07 | 1966-09-06 | 1967-03-08 | $7700.00 | Window Closed / Lapsed |