Patent US3397041A successfully refreshed from Google Patents.
US3397041A
Expired / Lapsed
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Sulfur purification by fractional condensation
Assignee: United States Atomic Energy Commission
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Filing: 1966-06-17
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Granted: 1968-08-13
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Expires: 1986-06-17
Abstract
No abstract record available.
Inventors
- 👤 Ronald D Rivers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 02:25
CPC Classifications
C; C01; C01B; C01B17/00; C01B17/02; C01B17/0232
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
106 words
A METHOD OF REMOVING ORGANIC AND INORGANIC IMPURTITIES FROM SULFUR TO PROVIDE PRODUCT SULFAR HAVING LESS THAN ABOUT ONE PART OF SAID IMPURITITES PER MILLION PARTS OF SULFUR, COMPRISING THE STEPS OF CONFUSING A SULFUR CHARGE CONTAINING ORGANIC AND INORGANIC IMPURITIES, HEATING THE SULFUR CHARGE TO A TEMPERATURE SUFFICIENT TO EFFECT BOILING THEREOF FOR PROVIDING VAPORS CONSISTING OF SULFUR AND IMPURITITES VOLATILE AT AND BELOW THE BOILING TEMERATURE OF SULFUR, COOLING THE VAPORS TO A TEMPERATURE SUFFICIENT TO EFFECT CONDENSATION OF THE SULFUR FROM THE VAPORS, INTRODUCING A STREAM OF INERT GAS INTO THE CONFINEMENT ABOVE THE SULFUR CHARGE AT A LOCATION IN WHICH THE TEM-
Claim 2
Independent Claim
106 words
A METHOD OF REMOVING ORGANIC AND INORGANIC IMPURTITIES FROM SULFUR TO PROVIDE PRODUCT SULFAR HAVING LESS THAN ABOUT ONE PART OF SAID IMPURITITES PER MILLION PARTS OF SULFUR, COMPRISING THE STEPS OF CONFUSING A SULFUR CHARGE CONTAINING ORGANIC AND INORGANIC IMPURITIES, HEATING THE SULFUR CHARGE TO A TEMPERATURE SUFFICIENT TO EFFECT BOILING THEREOF FOR PROVIDING VAPORS CONSISTING OF SULFUR AND IMPURITITES VOLATILE AT AND BELOW THE BOILING TEMERATURE OF SULFUR, COOLING THE VAPORS TO A TEMPERATURE SUFFICIENT TO EFFECT CONDENSATION OF THE SULFUR FROM THE VAPORS, INTRODUCING A STREAM OF INERT GAS INTO THE CONFINEMENT ABOVE THE SULFUR CHARGE AT A LOCATION IN WHICH THE TEM-
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-08-13 | 1972-02-12 | 1972-08-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-08-13 | 1976-02-12 | 1976-08-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-08-13 | 1980-02-12 | 1980-08-13 | $7700.00 | Window Closed / Lapsed |