Patent US2568077A successfully refreshed from Google Patents.
US2568077A
Expired / Lapsed
US
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Centrifugal mill hammer with renewable wearing tip
Assignee: Individual
•
Filing: 1947-07-23
•
Granted: 1951-09-18
•
Expires: 1967-07-23
Abstract
No abstract record available.
Inventors
- 👤 Frank J Loufek
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 11:41
CPC Classifications
B; B02; B02C; B02C13/00; B02C13/26; B02C13/28; Y; Y10; Y10T; Y10T403/00; Y10T403/61
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1212991A
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US1940116A
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US2045688A
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US2186047A
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US2397776A
Cited
US2467865A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-09-17 | 1955-03-19 | 1955-09-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-09-17 | 1959-03-19 | 1959-09-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-09-17 | 1963-03-19 | 1963-09-18 | $7700.00 | Window Closed / Lapsed |