Patent US2421697A successfully refreshed from Google Patents.
US2421697A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Card -time printing and punching recorder
Assignee: —
•
Filing: —
•
Granted: 1947-06-03
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Expires: 1964-06-03
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 07:42
CPC Classifications
G; G01; G01D; G01D15/00; G01D15/14; G07; G07C; G07C1/00; G07C1/02; G07C1/04; G07C1/06; Y; Y10; Y10T; Y10T83/00; Y10T83/647; Y10T83/6572; Y10T83/6574
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1473554A
Cited
US1731550A
Cited
US2312137A
Cited
US2338180A
Cited
US1396531A
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US1453019A
Cited
US1884189A
Cited
US2146283A
Cited
US2093555A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-06-02 | 1950-12-02 | 1951-06-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-06-02 | 1954-12-02 | 1955-06-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-06-02 | 1958-12-02 | 1959-06-03 | $7700.00 | Window Closed / Lapsed |