Patent US3038673A successfully refreshed from Google Patents.
US3038673A
Expired / Lapsed
US
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Attrition mill apparatus
Assignee: Sprout Waldron and Co Inc
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Filing: 1960-02-19
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Granted: 1962-06-12
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Expires: 1980-02-19
Abstract
No abstract record available.
Inventors
- 👤 Fisher Chester Donald
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 07:59
CPC Classifications
B; B02; B02C; B02C7/00; B02C7/02; B02C7/06; D; D21; D21D; D21D1/00; D21D1/20; D21D1/30
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-06-11 | 1965-12-11 | 1966-06-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-06-11 | 1969-12-11 | 1970-06-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-06-11 | 1973-12-11 | 1974-06-12 | $7700.00 | Window Closed / Lapsed |