US2552596A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Combined hammer mill crushing and oversize particle separating apparatus
Assignee: PULVERIZING MACHINERY Co
•
Filing: 1944-06-29
•
Granted: 1951-05-15
•
Expires: 1964-06-29
Abstract
No abstract record available.
Inventors
- 👤 William M Sheldon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 08:51
CPC Classifications
B; B02; B02C; B02C13/00; B02C13/13
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
DE259632C
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USRE16229E
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US1221144A
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GB203632A
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US1796545A
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US2042042A
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FR771372A
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GB444684A
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US2361758A
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US2359911A
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US2355784A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-05-14 | 1954-11-13 | 1955-05-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-05-14 | 1958-11-13 | 1959-05-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-05-14 | 1962-11-13 | 1963-05-15 | $7700.00 | Window Closed / Lapsed |