US2984561A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of roasting pyrites
Assignee: Honeywell International Inc
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Filing: 1960-04-15
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Granted: 1961-05-16
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Expires: 1980-04-15
Abstract
No abstract record available.
Inventors
- 👤 Allen C Amdur
- 👤 Curtis B Hayworth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 05:31
CPC Classifications
C; C22; C22B; C22B1/00; C22B1/02; B; B22; B22F; B22F9/00; B22F9/16; B22F9/18; B22F9/20; B22F9/22; C22B1/10; C22B1/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
145 words
A PROCESS OF REDUCING THE SULFUR CONTENT OF FINELY DIVIDED PARTICLES OF ROASTED PYRITES CONTAINING ABOUT 1-5% SULFUR TO A VALUE OF LESS THAN 0.1% SULFUR WITHOUT LOSS OF PARTICULATE IDENTITY WHICH COMPRISES PASSING A STREAM OF GAS CONTAINING 5-50% BY VOLUME HYDROGEN FLUORIDE AND 10-50% BY VOLUME OXYGEN IN CONTACT WITH THE FINELY DIVIDED PARTICLES OF ROASTED PYRITES TO EFFECT SUSPENSION AND AGITATION OF THE PARTICLES OF ROASTED PYRITES IN THE GAS STREAM TO ASSURE INTIMATE CONTACT BETWEEN THE GAS AND THE ROASTED PARTICLES AT A TEMPERATURE WITHIN THE RANGE OF ABOUT 700*F. TO BELOW THE FUSION OF THE ROASTED PYRITES FOR A SUFFICIENT LENGTH OF TIME TO EFFECT REDUCTION OF THE SULFUR CONTENT IN THE ROASTED PYRITES TO A LEVEL OF LESS THAN 0.1% SULFUR AND SEPARATING THE ROASTED PYRITES SUBSTANTIALLY FREE FROM SULFUR AND WITHOUT LOSS OF PARTICULATE IDENTITY FROM THE GAS.
Claim 2
Dependent Claim
145 words
A PROCESS OF REDUCING THE SULFUR CONTENT OF FINELY DIVIDED PARTICLES OF ROASTED PYRITES CONTAINING ABOUT 1-5% SULFUR TO A VALUE OF LESS THAN 0.1% SULFUR WITHOUT LOSS OF PARTICULATE IDENTITY WHICH COMPRISES PASSING A STREAM OF GAS CONTAINING 5-50% BY VOLUME HYDROGEN FLUORIDE AND 10-50% BY VOLUME OXYGEN IN CONTACT WITH THE FINELY DIVIDED PARTICLES OF ROASTED PYRITES TO EFFECT SUSPENSION AND AGITATION OF THE PARTICLES OF ROASTED PYRITES IN THE GAS STREAM TO ASSURE INTIMATE CONTACT BETWEEN THE GAS AND THE ROASTED PARTICLES AT A TEMPERATURE WITHIN THE RANGE OF ABOUT 700*F. TO BELOW THE FUSION OF THE ROASTED PYRITES FOR A SUFFICIENT LENGTH OF TIME TO EFFECT REDUCTION OF THE SULFUR CONTENT IN THE ROASTED PYRITES TO A LEVEL OF LESS THAN 0.1% SULFUR AND SEPARATING THE ROASTED PYRITES SUBSTANTIALLY FREE FROM SULFUR AND WITHOUT LOSS OF PARTICULATE IDENTITY FROM THE GAS.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-05-15 | 1964-11-14 | 1965-05-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-05-15 | 1968-11-14 | 1969-05-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-05-15 | 1972-11-14 | 1973-05-16 | $7700.00 | Window Closed / Lapsed |