Patent US3488683A successfully refreshed from Google Patents.
US3488683A
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US
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Variable contour cam
Assignee: Automatic Timing and Controls Inc
•
Filing: 1967-08-25
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Granted: 1970-01-06
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Expires: 1987-08-25
Abstract
No abstract record available.
Inventors
- 👤 Franklin W Kerfoot Jr
- 👤 Lewis Ellsworth Barth
- 👤 Grover K Houpt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 17:05
CPC Classifications
F; F16; F16H; F16H53/00; F16H53/02; F16H53/04; Y; Y10; Y10T; Y10T74/00; Y10T74/21; Y10T74/2101; Y10T74/2102
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2648237A
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US2759371A
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US2728248A
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US2812671A
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US2996935A
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US3194086A
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US3151500A
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US3301089A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-01-05 | 1973-07-07 | 1974-01-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-01-05 | 1977-07-07 | 1978-01-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-01-05 | 1981-07-07 | 1982-01-06 | $7700.00 | Window Closed / Lapsed |