Patent US3416622A successfully refreshed from Google Patents.
US3416622A
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US
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Method for stabilizing a crawler crane
Assignee: PERCY R HELM
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Filing: 1966-11-07
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Granted: 1968-12-17
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Expires: 1986-11-07
Abstract
No abstract record available.
Inventors
- 👤 Percy R Helm
- 👤 Carl O Lewis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 02:32
CPC Classifications
B; B66; B66C; B66C23/00; B66C23/62; B62; B62D; B62D55/00; B62D55/08; B62D55/084
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1758584A
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US2324681A
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US2618349A
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US2693392A
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US2681231A
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US2763330A
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US3048443A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-12-17 | 1972-06-17 | 1972-12-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-12-17 | 1976-06-17 | 1976-12-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-12-17 | 1980-06-17 | 1980-12-17 | $7700.00 | Window Closed / Lapsed |