US3529781A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotary grinding mill
Assignee: FLSmidth and Co AS
•
Filing: 1967-06-19
•
Granted: 1970-09-22
•
Expires: 1987-06-19
Abstract
No abstract record available.
Inventors
- 👤 Niels E Hastrup
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 08:54
CPC Classifications
B; B02; B02C; B02C17/00; B02C17/18; B02C17/04; B02C17/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1368739A
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US1712082A
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US1520537A
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US1630992A
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US1649813A
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US2332701A
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DE1055927B
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US2885155A
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US3144212A
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US3298618A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-09-21 | 1974-03-23 | 1974-09-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-09-21 | 1978-03-23 | 1978-09-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-09-21 | 1982-03-23 | 1982-09-22 | $7700.00 | Window Closed / Lapsed |