Patent US2999651A successfully refreshed from Google Patents.
US2999651A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Single stage rock crusher
Assignee: MINING RES CORP
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Filing: 1958-07-11
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Granted: 1961-09-12
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Expires: 1978-07-11
Abstract
No abstract record available.
Inventors
- 👤 John D Ault
- 👤 David P Mcconnell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 04:36
CPC Classifications
B; B02; B02C; B02C1/00; B02C1/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
DE515819C
Cited
GB190721664A
Cited
US945372A
Cited
GB191216025A
Cited
US1936742A
Cited
US2652985A
Cited
DE805486C
Cited
US2609154A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-09-11 | 1965-03-13 | 1965-09-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-09-11 | 1969-03-13 | 1969-09-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-09-11 | 1973-03-13 | 1973-09-12 | $7700.00 | Window Closed / Lapsed |