Patent US3457797A successfully refreshed from Google Patents.
US3457797A
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Variable speed drive
Assignee: MASSEY COMBINES Corp 225 HENRY ST BRANTFORD ONTARIO CANADA N3T 5ML A CORP OF ONTARIO
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Filing: 1967-10-12
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Granted: 1969-07-29
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Expires: 1987-10-12
Abstract
No abstract record available.
Inventors
- 👤 Robert Ashton
- 👤 Wilbert D Weber
- 👤 Walter Hirsch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 12:36
CPC Classifications
F; F16; F16H; F16H9/00; F16H9/02; F16H9/04; F16H9/12; F16H9/16; F16H2009/166
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1514158A
Cited
US1663344A
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US2054533A
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US2082688A
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US2401670A
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US2639569A
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US2843431A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-07-28 | 1973-01-27 | 1973-07-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-07-28 | 1977-01-27 | 1977-07-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-07-28 | 1981-01-27 | 1981-07-29 | $7700.00 | Window Closed / Lapsed |