Patent US2428084A successfully refreshed from Google Patents.
US2428084A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Calculating machine
Assignee: —
•
Filing: —
•
Granted: 1947-09-30
•
Expires: 1964-09-30
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 22:15
CPC Classifications
G; G06; G06C; G06C15/00; G06C15/04; G06C15/06; G06C7/00; G06C7/02; G06C7/08
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1854875A
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US1915296A
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Cited
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Cited
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Cited
US2280920A
Cited
US2149371A
Cited
US2244241A
Cited
US2251097A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-09-29 | 1951-03-31 | 1951-09-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-09-29 | 1955-03-31 | 1955-09-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-09-29 | 1959-03-31 | 1959-09-30 | $7700.00 | Window Closed / Lapsed |