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US2464774A
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Single roll crusher with opposed toothed-apron feed
Assignee: Pennsylvania Crusher Co
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Filing: 1946-04-22
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Granted: 1949-03-15
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Expires: 1966-04-22
Abstract
No abstract record available.
Inventors
- 👤 Edwin H Keiper
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 21:58
CPC Classifications
B; B02; B02C; B02C4/00; B02C4/10; B02C4/12
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US871176A
Cited
US1268479A
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US1458695A
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US1560049A
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US1618721A
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US2212616A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-03-14 | 1952-09-13 | 1953-03-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-03-14 | 1956-09-13 | 1957-03-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-03-14 | 1960-09-13 | 1961-03-15 | $7700.00 | Window Closed / Lapsed |