Patent US3531092A successfully refreshed from Google Patents.
US3531092A
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Rotary batch mixer and method
Assignee: Praschak Machine Co Inc
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Filing: 1968-10-22
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Granted: 1970-09-29
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Expires: 1988-10-22
Abstract
No abstract record available.
Inventors
- 👤 Gerald H Praschak
- 👤 Dwight E Howden Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 11:17
CPC Classifications
B; B01; B01F; B01F27/00; B01F27/80; B01F27/808; B01F35/00; B01F35/50; B01F27/05; B01F27/09; B01F27/091; B01F27/11; B01F27/112; B01F27/1123; B01F35/30; B01F35/32; B01F35/321; B01F35/3213
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) | 1973-09-28 | 1974-03-30 | 1974-09-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-09-28 | 1978-03-30 | 1978-09-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-09-28 | 1982-03-30 | 1982-09-29 | $7700.00 | Window Closed / Lapsed |