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US2780674A
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Circuit-arrangement for engaging an apparatus
Assignee: Hartford National Bank and Trust Co
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Filing: 1951-07-19
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Granted: 1957-02-05
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Expires: 1971-07-19
Abstract
No abstract record available.
Inventors
- 👤 Six Willem
- 👤 Domburg Jacobus
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 09:34
CPC Classifications
H; H04; H04Q; H04Q3/00; H04Q3/42; H04Q3/52; H04Q3/525
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2023589A
Cited
US2152889A
Cited
US2502415A
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US2576097A
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US2542672A
Cited
US2684405A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-02-05 | 1960-08-06 | 1961-02-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-02-05 | 1964-08-06 | 1965-02-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-02-05 | 1968-08-06 | 1969-02-05 | $7700.00 | Window Closed / Lapsed |