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Patent US2701970A successfully refreshed from Google Patents.
US2701970A
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US
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Friction contact type speed changer
Assignee: Excelermatic Inc
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Filing: 1951-01-17
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Granted: 1955-02-15
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Expires: 1971-01-17
Abstract
No abstract record available.
Inventors
- 👤 Charles E Kraus
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 08:34
CPC Classifications
F; F16; F16H; F16H15/00; F16H15/02; F16H15/04; F16H15/44
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1058981A
Cited
US1585140A
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US1616311A
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US1788108A
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GB477537A
Cited
US2083656A
Cited
US2108082A
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US2201176A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-02-14 | 1958-08-16 | 1959-02-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-02-14 | 1962-08-16 | 1963-02-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-02-14 | 1966-08-16 | 1967-02-15 | $7700.00 | Window Closed / Lapsed |