Patent US2424316A successfully refreshed from Google Patents.
US2424316A
Expired / Lapsed
US
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Two stage hammer mill
Assignee: MASSEY HARRIS CO Ltd
•
Filing: 1945-02-23
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Granted: 1947-07-22
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Expires: 1965-02-23
Abstract
No abstract record available.
Inventors
- 👤 Johnston Howard Milton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 09:14
CPC Classifications
B; B02; B02C; B02C13/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1025480A
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US1440429A
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US1828490A
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US2087492A
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US2122658A
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US2169684A
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US2298712A
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GB557228A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-07-21 | 1951-01-20 | 1951-07-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-07-21 | 1955-01-20 | 1955-07-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-07-21 | 1959-01-20 | 1959-07-22 | $7700.00 | Window Closed / Lapsed |