Patent US2879952A successfully refreshed from Google Patents.
US2879952A
Expired / Lapsed
US
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Roll crusher for simultaneous crushing of large and small pieces of material
Assignee: Cedarapids Inc
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Filing: 1955-11-09
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Granted: 1959-03-31
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Expires: 1975-11-09
Abstract
No abstract record available.
Inventors
- 👤 Harold C Pollitz
- 👤 Edward O Spangler
- 👤 Norman H Kessler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 16:25
CPC Classifications
B; B02; B02C; B02C4/00; B02C4/02; B02C4/08
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
NL39721C
Cited
US1321858A
Cited
US1412793A
Cited
US1560304A
Cited
FR595675A
Cited
DE633253C
Cited
US2589603A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-03-30 | 1962-09-29 | 1963-03-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-03-30 | 1966-09-29 | 1967-03-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-03-30 | 1970-09-29 | 1971-03-31 | $7700.00 | Window Closed / Lapsed |