Patent US3028681A successfully refreshed from Google Patents.
US3028681A
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Apparatus for treating granular materials
Assignee: Svenska Flaktfabriken AB
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Filing: 1959-03-26
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Granted: 1962-04-10
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Expires: 1979-03-26
Abstract
No abstract record available.
Inventors
- 👤 Jorman Gote
- 👤 Oholm Gustav
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 11:39
CPC Classifications
B; B01; B01J; B01J8/00; B01J8/18; B01J8/24; B01J8/245; F; F26; F26B; F26B3/00; F26B3/02; F26B3/06; F26B3/08; F26B3/092; F26B3/0926
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1648005A
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US1635527A
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US2055385A
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US2118078A
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US2582710A
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US2689973A
Cited
US2843942A
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US2876557A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-04-09 | 1965-10-09 | 1966-04-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-04-09 | 1969-10-09 | 1970-04-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-04-09 | 1973-10-09 | 1974-04-10 | $7700.00 | Window Closed / Lapsed |