US3530668A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rapid gear-change apparatus
Assignee: Individual
•
Filing: 1969-03-25
•
Granted: 1970-09-29
•
Expires: 1989-03-25
Abstract
No abstract record available.
Inventors
- 👤 Gunter Siebers
- 👤 Karl Prenzel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 00:07
CPC Classifications
F; F16; F16H; F16H61/00; F16H61/26; F16H61/28; F16H61/2807; F16H61/02; F16H61/0202; F16H61/0204; F16H61/0206; F16H63/00; F16H63/02; F16H63/30; F16H63/3023; F16H61/30; F16H2061/305; Y; Y10; Y10T; Y10T74/00; Y10T74/19; Y10T74/19219; Y10T74/19251; Y10T74/19256; Y10T74/1926
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2839944A
Cited
US2995949A
Cited
US3208220A
Cited
US3200590A
Cited
US3359725A
Cited
US3448640A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-09-28 | 1974-03-30 | 1974-09-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-09-28 | 1978-03-30 | 1978-09-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-09-28 | 1982-03-30 | 1982-09-29 | $7700.00 | Window Closed / Lapsed |