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US2909331A
Expired / Lapsed
US
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Particle mill system
Assignee: MAJAC Inc
•
Filing: 1954-06-07
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Granted: 1959-10-20
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Expires: 1974-06-07
Abstract
No abstract record available.
Inventors
- 👤 George M Croft
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 18:48
CPC Classifications
B; B02; B02C; B02C19/00; B02C19/06; B02C23/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US990157A
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US1512687A
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US1512323A
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US1846209A
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US1698361A
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US1791100A
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US1845567A
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US2041188A
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US2113885A
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US2672296A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-10-19 | 1963-04-20 | 1963-10-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-10-19 | 1967-04-20 | 1967-10-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-10-19 | 1971-04-20 | 1971-10-20 | $7700.00 | Window Closed / Lapsed |