Patent US2798676A successfully refreshed from Google Patents.
US2798676A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Split shell for roll crusher
Assignee: Poor and Co
•
Filing: 1954-08-04
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Granted: 1957-07-09
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Expires: 1974-08-04
Abstract
No abstract record available.
Inventors
- 👤 Heer Ralph William
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 03:07
CPC Classifications
B; B02; B02C; B02C4/00; B02C4/28; B02C4/30
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1410546A
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US1446274A
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US1654037A
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US1771739A
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GB394430A
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GB507971A
Cited
US2219085A
Cited
US2294098A
Cited
US2610554A
Cited
US2638722A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-07-08 | 1961-01-07 | 1961-07-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-07-08 | 1965-01-07 | 1965-07-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-07-08 | 1969-01-07 | 1969-07-09 | $7700.00 | Window Closed / Lapsed |