US2524704A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Card indexing device
Assignee: Individual
•
Filing: 1947-04-26
•
Granted: 1950-10-03
•
Expires: 1967-04-26
Abstract
No abstract record available.
Inventors
- 👤 Henderson Robert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 06:10
CPC Classifications
B; B42; B42F; B42F17/00; B42F17/34; B42F17/346; Y; Y10; Y10T; Y10T74/00; Y10T74/18; Y10T74/18056; Y10T74/18288
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US513343A
Cited
US647218A
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US700906A
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US834294A
Cited
US854110A
Cited
US856841A
Cited
US1069122A
Cited
US1531429A
Cited
US1543599A
Cited
US2329300A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-10-02 | 1954-04-03 | 1954-10-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-10-02 | 1958-04-03 | 1958-10-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-10-02 | 1962-04-03 | 1962-10-03 | $7700.00 | Window Closed / Lapsed |