Patent US2869900A successfully refreshed from Google Patents.
US2869900A
Expired / Lapsed
US
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Dust seal for an industrial mixer
Assignee: Worthington Corp
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Filing: 1957-09-16
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Granted: 1959-01-20
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Expires: 1977-09-16
Abstract
No abstract record available.
Inventors
- 👤 Paul S Heteji
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 04:46
CPC Classifications
B; B01; B01F; B01F29/00; B01F29/60; B01F29/63; B01F35/00; B01F35/181; B01F35/184; B01F35/30; B01F2035/35; B01F2035/351
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2544545A
Cited
US2563770A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-01-19 | 1962-07-21 | 1963-01-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-01-19 | 1966-07-21 | 1967-01-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-01-19 | 1970-07-21 | 1971-01-20 | $7700.00 | Window Closed / Lapsed |