US2646923A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for determining check symbols
Assignee: Individual
•
Filing: 1948-08-27
•
Granted: 1953-07-28
•
Expires: 1968-08-27
Abstract
No abstract record available.
Inventors
- 👤 Reumerman Theodorus
- 👤 Helmig Willem Hendrik Theodoor
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 00:03
CPC Classifications
G; G06; G06F; G06F11/00; G06F11/07; G06F11/08; G06F11/10; G06F11/1008; G06F11/1012; G06F11/104; H; H04; H04M; H04M1/00; H04M1/56
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US159765A
Cited
US637049A
Cited
US888781A
Cited
US1500077A
Cited
US1896757A
Cited
US1917049A
Cited
US1966118A
Cited
US2072657A
Cited
US2183656A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-07-27 | 1957-01-26 | 1957-07-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-07-27 | 1961-01-26 | 1961-07-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-07-27 | 1965-01-26 | 1965-07-28 | $7700.00 | Window Closed / Lapsed |