Patent US2754054A successfully refreshed from Google Patents.
US2754054A
Expired / Lapsed
US
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Devices for determining check symbols for symbol groups
Assignee: Individual
•
Filing: 1951-03-06
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Granted: 1956-07-10
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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
2026-10-23 09:09
CPC Classifications
G; G06; G06F; G06F11/00; G06F11/07; G06F11/08; G06F11/10; G06F11/1008; G06F11/1012; G06F11/104; B; B41; B41F; B41F33/00; B41F33/009; B41K; B41K3/00; B41K3/02; B41K3/04; B41K3/10; B41K3/102; G06M; G06M1/00; G06M1/04; G06M1/041; G06M1/042; G06M3/00; G06M3/12; H; H04; H04M; H04M15/00; H04M15/10
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-07-10 | 1960-01-09 | 1960-07-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-07-10 | 1964-01-09 | 1964-07-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-07-10 | 1968-01-09 | 1968-07-10 | $7700.00 | Window Closed / Lapsed |