US2674940A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multiple card system
Assignee: Individual
•
Filing: 1951-08-15
•
Granted: 1954-04-13
•
Expires: 1971-08-15
Abstract
No abstract record available.
Inventors
- 👤 Walter J Carney
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 15:21
CPC Classifications
B; B41; B41L; B41L3/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
FR962748A
Cited
US1169813A
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US1069435A
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US1127986A
Cited
US1761722A
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US2070181A
Cited
US2135345A
Cited
US2134112A
Cited
US2335992A
Cited
US2405508A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-04-12 | 1957-10-12 | 1958-04-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-04-12 | 1961-10-12 | 1962-04-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-04-12 | 1965-10-12 | 1966-04-13 | $7700.00 | Window Closed / Lapsed |