Patent US2685115A successfully refreshed from Google Patents.
US2653761A
Expired / Lapsed
US
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Electromechanical calculating machine
Assignee: Individual
•
Filing: 1948-02-24
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Granted: 1953-09-29
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Expires: 1968-02-24
Abstract
No abstract record available.
Inventors
- 👤 Lawrence John Albert
- 👤 Heron Kenneth Malcolm
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:43
CPC Classifications
G; G06; G06F; G06F7/00; G06F7/38; G06F7/40; G06F7/42
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1876294A
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US2165298A
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DE716154C
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US2099754A
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GB450015A
Cited
US2061715A
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US2305779A
Cited
US2486809A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-09-28 | 1957-03-30 | 1957-09-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-09-28 | 1961-03-30 | 1961-09-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-09-28 | 1965-03-30 | 1965-09-29 | $7700.00 | Window Closed / Lapsed |