US2585224A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stone crushing device
Assignee: Individual
•
Filing: 1948-04-30
•
Granted: 1952-02-12
•
Expires: 1968-04-30
Abstract
No abstract record available.
Inventors
- 👤 Robert A Campbell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 22:56
CPC Classifications
E; E02; E02F; E02F5/00; E02F5/30; B; B02; B02C; B02C21/00; B02C21/02; E01; E01C; E01C19/00; E01C19/46; E01C19/466
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US104537A
Cited
US120972A
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US234027A
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US703461A
Cited
US1525450A
Cited
US1462096A
Cited
US1941770A
Cited
US2114078A
Cited
US2201493A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-02-11 | 1955-08-13 | 1956-02-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-02-11 | 1959-08-13 | 1960-02-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-02-11 | 1963-08-13 | 1964-02-12 | $7700.00 | Window Closed / Lapsed |