US2819157A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of treating sulfide solids under solids fluidizing conditions
Assignee: Dorr Oliver Inc
•
Filing: 1953-07-17
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Granted: 1958-01-07
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Expires: 1973-07-17
Abstract
No abstract record available.
Inventors
- 👤 Fischer Francois Albert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 13:11
CPC Classifications
C; C22; C22B; C22B1/00; C22B1/02; C22B1/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
93 words
THE PROCESS FOR TREATING FINELY DIVIDED SULFIDE SOLIDS UNDER SOLIDS FLUIDIZING CONDITIONS AND AT TEMPERATURES ABOVE THE FUSION POINT OF SUCH SOLIDS, COMPRISING THE STEPS OF MAINTAINING A MASS OF SUCH SOLIDS AT FUSION TEMPERATURES WHEREBY SUCH SOLIDS FUSE INTO AGGLOMERATES OF INCREASED SIZE, TREATING SUCH FUSED SOLIDS IN SUCH BED AND CONTINUOUSLY MAINTAINING A MASS OF SUCH FUSED SOLIDS AS A FLUIDIZED BED DURING SUCH TREATMENT BY PASSING FLUIDIZING GASES UPWARDLY THERETHROUGH AT A VELOCITY IN EXCESS OF THAT VELOCITY REQUIRED TO FLUIDIZE THE SAME SOLIDS AT TEMPERATURES BELOW THEIR FUSION POINT.
Claim 2
Dependent Claim
93 words
THE PROCESS FOR TREATING FINELY DIVIDED SULFIDE SOLIDS UNDER SOLIDS FLUIDIZING CONDITIONS AND AT TEMPERATURES ABOVE THE FUSION POINT OF SUCH SOLIDS, COMPRISING THE STEPS OF MAINTAINING A MASS OF SUCH SOLIDS AT FUSION TEMPERATURES WHEREBY SUCH SOLIDS FUSE INTO AGGLOMERATES OF INCREASED SIZE, TREATING SUCH FUSED SOLIDS IN SUCH BED AND CONTINUOUSLY MAINTAINING A MASS OF SUCH FUSED SOLIDS AS A FLUIDIZED BED DURING SUCH TREATMENT BY PASSING FLUIDIZING GASES UPWARDLY THERETHROUGH AT A VELOCITY IN EXCESS OF THAT VELOCITY REQUIRED TO FLUIDIZE THE SAME SOLIDS AT TEMPERATURES BELOW THEIR FUSION POINT.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-01-06 | 1961-07-08 | 1962-01-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-01-06 | 1965-07-08 | 1966-01-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-01-06 | 1969-07-08 | 1970-01-07 | $7700.00 | Window Closed / Lapsed |