US2656091A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Card index device
Assignee: Individual
•
Filing: 1951-03-06
•
Granted: 1953-10-20
•
Expires: 1971-03-06
Abstract
No abstract record available.
Inventors
- 👤 Mathiesen Nicolaus Per
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 08:35
CPC Classifications
B; B42; B42F; B42F17/00; B42F17/02; Y; Y10; Y10S; Y10S206/00; Y10S206/818
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-10-19 | 1957-04-20 | 1957-10-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-10-19 | 1961-04-20 | 1961-10-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-10-19 | 1965-04-20 | 1965-10-20 | $7700.00 | Window Closed / Lapsed |