Patent US3332853A successfully refreshed from Google Patents.
US3332853A
Expired / Lapsed
US
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Apparatus for effecting dense phase fluidisation of particulate material
Assignee: Coal Industry Patents Ltd
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Filing: 1963-06-21
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Granted: 1967-07-25
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Expires: 1983-06-21
Abstract
No abstract record available.
Inventors
- 👤 Urquhart Donald Bremner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 18:35
CPC Classifications
B; B01; B01J; B01J8/00; B01J8/18; B01J8/24; B01J8/44; B01J19/00; B01J19/26; B01J8/1818; B01J2219/00; B01J2219/00049; B01J2219/00051; B01J2219/0015; B01J2219/00155; B01J2219/00162; B01J2219/00164; B01J2219/19; B01J2219/194; B01J2219/1941; B01J2219/1946
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
CA478374A
Cited
US1984380A
Cited
US2468508A
Cited
GB600326A
Cited
US2719818A
Cited
US2886307A
Cited
DE1064201B
Cited
US3057701A
Cited
DE1070872B
Cited
US3074777A
Cited
US3101249A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-07-24 | 1971-01-23 | 1971-07-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-07-24 | 1975-01-23 | 1975-07-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-07-24 | 1979-01-23 | 1979-07-25 | $7700.00 | Window Closed / Lapsed |