Patent US2538826A successfully refreshed from Google Patents.
US2538826A
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Calculating machine
Assignee: MARCHANT CALCULATING MACHINE
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Filing: 1949-03-15
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Granted: 1951-01-23
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Expires: 1969-03-15
Abstract
No abstract record available.
Inventors
- 👤 Harold T Avery
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:39
CPC Classifications
G; G06; G06G; G06G7/00; G06G7/12; G06G7/16; G06G7/163; G06F; G06F7/00; G06F7/38; G06F7/48; G06F7/483; G06F7/487; G06F7/4873; G06F7/52; G06F7/535; G06F2207/00; G06F2207/535; G06F2207/5356
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) | 1954-01-22 | 1954-07-24 | 1955-01-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-01-22 | 1958-07-24 | 1959-01-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-01-22 | 1962-07-24 | 1963-01-23 | $7700.00 | Window Closed / Lapsed |