US2648987A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Variable-speed v-belt transmission
Assignee: Individual
•
Filing: 1949-01-11
•
Granted: 1953-08-18
•
Expires: 1969-01-11
Abstract
No abstract record available.
Inventors
- 👤 George W Curtis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 21:45
CPC Classifications
F; F16; F16H; F16H9/00; F16H9/02; F16H9/04; F16H9/12; F16H9/16; F16H2009/163; Y; Y10; Y10T; Y10T74/00; Y10T74/18; Y10T74/18056; Y10T74/18296; Y10T74/18304
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1728482A
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US1953360A
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US1993547A
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US2024460A
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US2074997A
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US2168744A
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US2185435A
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US2183267A
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US2238841A
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US2336002A
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US2347479A
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US2534943A
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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) | 1956-08-17 | 1957-02-16 | 1957-08-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-08-17 | 1961-02-16 | 1961-08-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-08-17 | 1965-02-16 | 1965-08-18 | $7700.00 | Window Closed / Lapsed |