US2657119A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Conversion of sulfur dioxide to sulfur with hydroquinones
Assignee: Texas Gulf Sulphur Co
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Filing: 1950-07-06
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Granted: 1953-10-27
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Expires: 1970-07-06
Abstract
No abstract record available.
Inventors
- 👤 Richard A Patton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 12:16
CPC Classifications
C; C01; C01B; C01B17/00; C01B17/02; C01B17/06
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
29 words
THE PROCESS OF PRODUCING SULPHUR BY THE REDUCTION OF SULPHUR DIOXIDE COMPRISING REACTING A SULPHUR DIOXIDE-CONTAINING GAS WITH A HYDROQUINONE HAVING AN OXIDATION POTENTIAL OF MORE THAN -0.47 VOLT.
Claim 2
Dependent Claim
29 words
THE PROCESS OF PRODUCING SULPHUR BY THE REDUCTION OF SULPHUR DIOXIDE COMPRISING REACTING A SULPHUR DIOXIDE-CONTAINING GAS WITH A HYDROQUINONE HAVING AN OXIDATION POTENTIAL OF MORE THAN -0.47 VOLT.
Claim 3
Dependent Claim
69 words
THE PROCESS FOR CONVERTING SULPHUR DIOXIDE TO SULPHUR COMPRISING REACTING SULPHUR DIOXIDE WITH A HYDROQUINONE HAVING AN OXIDATION POTENTIAL OF MORE THAN -0.47 VOLT, THEREBY CONVERTING AT LEAST PART OF SAID SULPHUR DIOXIDE INTO SULPHUR AND AT LEAST PART OF SAID HYDROQUINONE INTO THE CORRESPONDING QUINONE, CONTINUOUSLY REDUCING SAID QUINONE SO PRODUCED, THEREBY REGENERATING IT INTO THE HYDROQUINONE, AND REACTING ADDITIONAL QUANTITIES OF SULPHUR DIOXIDE WITH THE REGENEARATED HYDROQUINONE.
Claim 4
Dependent Claim
69 words
THE PROCESS FOR CONVERTING SULPHUR DIOXIDE TO SULPHUR COMPRISING REACTING SULPHUR DIOXIDE WITH A HYDROQUINONE HAVING AN OXIDATION POTENTIAL OF MORE THAN -0.47 VOLT, THEREBY CONVERTING AT LEAST PART OF SAID SULPHUR DIOXIDE INTO SULPHUR AND AT LEAST PART OF SAID HYDROQUINONE INTO THE CORRESPONDING QUINONE, CONTINUOUSLY REDUCING SAID QUINONE SO PRODUCED, THEREBY REGENERATING IT INTO THE HYDROQUINONE, AND REACTING ADDITIONAL QUANTITIES OF SULPHUR DIOXIDE WITH THE REGENEARATED HYDROQUINONE.
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) | 1956-10-26 | 1957-04-27 | 1957-10-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-10-26 | 1961-04-27 | 1961-10-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-10-26 | 1965-04-27 | 1965-10-27 | $7700.00 | Window Closed / Lapsed |