US2512879A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Record sensing device of the capacitive type for use with business machines
Assignee: Unisys Corp
•
Filing: 1948-01-20
•
Granted: 1950-06-27
•
Expires: 1968-01-20
Abstract
No abstract record available.
Inventors
- 👤 Edwin O Roggenstein
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 22:27
CPC Classifications
G; G06; G06K; G06K7/00; G06K7/04; G06K7/042
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1872372A
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US2238555A
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US2231174A
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US2368953A
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US2368052A
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US2322563A
Cited
US2417427A
Cited
US2423617A
Cited
US2443125A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-06-26 | 1953-12-26 | 1954-06-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-06-26 | 1957-12-26 | 1958-06-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-06-26 | 1961-12-26 | 1962-06-27 | $7700.00 | Window Closed / Lapsed |