Patent US2477702A successfully refreshed from Google Patents.
US2477702A
Expired / Lapsed
US
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Backspacing mechanism
Assignee: COXHEAD RALPH C CORP
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Filing: 1946-05-15
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Granted: 1949-08-02
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Expires: 1966-05-15
Abstract
No abstract record available.
Inventors
- 👤 Charles W Norton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 19:41
CPC Classifications
B; B41; B41J; B41J25/00; B41J25/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1183056A
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US1918304A
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US1984410A
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US1941018A
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US2127431A
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US2224766A
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US2268867A
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US2294721A
Cited
US2364653A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-08-01 | 1953-01-31 | 1953-08-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-08-01 | 1957-01-31 | 1957-08-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-08-01 | 1961-01-31 | 1961-08-02 | $7700.00 | Window Closed / Lapsed |