US3052455A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ripper type mining machine
Assignee: Potash Corp of Saskatchewan Inc
•
Filing: 1959-01-08
•
Granted: 1962-09-04
•
Expires: 1979-01-08
Abstract
No abstract record available.
Inventors
- 👤 Asa L Mclaughlin
- 👤 Frederick J Priesnitz
- 👤 Russell G Haworth
- 👤 William M Fleming
- 👤 Conder L Stevens
- 👤 Bert L Frost
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 01:14
CPC Classifications
E; E21; E21C; E21C27/00; E21C27/10
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1332662A
Cited
US1143897A
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US2269781A
Cited
US2665794A
Cited
US2692130A
Cited
US2839281A
Cited
US2696375A
Cited
US2788202A
Cited
US2776127A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-09-03 | 1966-03-05 | 1966-09-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-09-03 | 1970-03-05 | 1970-09-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-09-03 | 1974-03-05 | 1974-09-04 | $7700.00 | Window Closed / Lapsed |