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US2811309A
Expired / Lapsed
US
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Statistical machines
Assignee: Powers Samas Accounting Machines Ltd
•
Filing: 1956-03-16
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Granted: 1957-10-29
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Expires: 1976-03-16
Abstract
No abstract record available.
Inventors
- 👤 Piper Ronald Newman
- 👤 Dawson Eric
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 10:55
CPC Classifications
B; B41; B41J; B41J1/00; B41J1/22; B41J1/24
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2569879A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-10-28 | 1961-04-29 | 1961-10-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-10-28 | 1965-04-29 | 1965-10-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-10-28 | 1969-04-29 | 1969-10-29 | $7700.00 | Window Closed / Lapsed |