Patent US3368420A successfully refreshed from Google Patents.
US3368420A
Expired / Lapsed
US
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Multiple drive shafts
Assignee: Kiekhaefer Corp
•
Filing: 1965-08-02
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Granted: 1968-02-13
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Expires: 1985-08-02
Abstract
No abstract record available.
Inventors
- 👤 Jr Charles F Alexander
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 12:51
CPC Classifications
B; B63; B63H; B63H20/00; B63H20/14; B63H20/08; B63H20/10; B63H23/00; B63H23/02; B63H23/04; B63H23/32; B63H23/34; F; F16; F16H; F16H1/00; F16H1/02; F16H1/20; F16H1/22; F16H1/222; Y; Y10; Y10T; Y10T74/00; Y10T74/19; Y10T74/19628; Y10T74/19642; Y10T74/19674
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1040443A
Cited
US2475329A
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US2641937A
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US2959975A
Cited
US3167967A
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US3259100A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-02-12 | 1971-08-14 | 1972-02-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-02-12 | 1975-08-14 | 1976-02-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-02-12 | 1979-08-14 | 1980-02-13 | $7700.00 | Window Closed / Lapsed |