Patent US3539053A successfully refreshed from Google Patents.
US3539053A
Expired / Lapsed
US
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Swinging crane with high mechanical advantage braking
Assignee: Pettibone Corp
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Filing: 1968-06-24
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Granted: 1970-11-10
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Expires: 1988-06-24
Abstract
No abstract record available.
Inventors
- 👤 William J Lado
- 👤 John F Hefferin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 20:28
CPC Classifications
B; B66; B66C; B66C23/00; B66C23/62; B66C23/84; B66C23/86; F; F16; F16D; F16D55/00; F16D55/02; F16D55/22; F16D55/228; Y; Y10; Y10T; Y10T74/00; Y10T74/19; Y10T74/19642; Y10T74/19698; Y10T74/19828
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-11-09 | 1974-05-11 | 1974-11-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-11-09 | 1978-05-11 | 1978-11-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-11-09 | 1982-05-11 | 1982-11-10 | $7700.00 | Window Closed / Lapsed |