Patent US2991503A successfully refreshed from Google Patents.
US2991503A
Expired / Lapsed
US
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Breaking, mixing, and extrusion apparatus
Assignee: Rietz Manufacturing Co
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Filing: 1958-01-06
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Granted: 1961-07-11
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Expires: 1978-01-06
Abstract
No abstract record available.
Inventors
- 👤 Carl A Rietz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 23:22
CPC Classifications
B; B02; B02C; B02C18/00; B02C18/30; B02C18/301; B02C18/302; B01; B01F; B01F27/00; B01F27/60; B01F27/70; B01F27/707; B02C13/00; B02C13/10
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1964266A
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US2434690A
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US2401236A
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US2738932A
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US2783498A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-07-10 | 1965-01-09 | 1965-07-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-07-10 | 1969-01-09 | 1969-07-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-07-10 | 1973-01-09 | 1973-07-11 | $7700.00 | Window Closed / Lapsed |