US3045771A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Crawler with independently tiltable tread frames
Assignee: Joy Manufacturing Co
•
Filing: 1959-04-09
•
Granted: 1962-07-24
•
Expires: 1979-04-09
Abstract
No abstract record available.
Inventors
- 👤 John C Curtis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 00:41
CPC Classifications
E; E21; E21B; E21B7/00; E21B7/02; E21B7/025; B; B62; B62D; B62D55/00; B62D55/08; B62D55/084; B62D55/0842
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1331088A
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US2428502A
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US2534772A
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US2842340A
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US2809703A
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US2845251A
Cited
US2940532A
Cited
US2828137A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-07-23 | 1966-01-22 | 1966-07-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-07-23 | 1970-01-22 | 1970-07-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-07-23 | 1974-01-22 | 1974-07-24 | $7700.00 | Window Closed / Lapsed |