Patent US2722378A successfully refreshed from Google Patents.
US2722378A
Expired / Lapsed
US
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Means for determining check symbols for symbol groups
Assignee: Individual
•
Filing: 1951-03-06
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Granted: 1955-11-01
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Expires: 1971-03-06
Abstract
No abstract record available.
Inventors
- 👤 Willem H T Helmig
- 👤 Reumerman Theodorus
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 12:18
CPC Classifications
G; G06; G06F; G06F11/00; G06F11/07; G06F11/08; G06F11/10; G06F11/1008; G06F11/1012; G06F11/104; G06Q; G06Q20/00; G06Q20/08; G06Q20/10; G06Q20/14; G06Q20/30; G06Q20/305; G06Q40/00; G06Q40/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2324957A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-10-31 | 1959-05-02 | 1959-11-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-10-31 | 1963-05-02 | 1963-11-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-10-31 | 1967-05-02 | 1967-11-01 | $7700.00 | Window Closed / Lapsed |