Patent US2565215A successfully refreshed from Google Patents.
US2565215A
Expired / Lapsed
US
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Preparation of carbon disulfide
Assignee: Pure Oil Co
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Filing: 1947-04-25
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Granted: 1951-08-21
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Expires: 1967-04-25
Abstract
No abstract record available.
Inventors
- 👤 Hillis O Folkins
- 👤 Elmer L Miller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 03:06
CPC Classifications
C; C01; C01B; C01B32/00; C01B32/70
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
59 words
THE METHOD OF PREPARING CARBON DISULFIDE COMPRISING CONTACTING HYDROCARBON GAS RICH IN METHANE AND SULFUR IN APPROXIMATELY RICH IN CHIOMETRIC RATIO REQUIRED FOR FORMATION OF HYDROGEN SULFIDE AND CARBON DISULFIDE WITH A SYNTHETIC SILICA-ALUMINA CATALYST CONSISTING ESSENTIALLY OF ABOUT 2 TO 10 PER CENT BY WEIGHT OF SILICA ON ALUMINA AT A TEMPERATURE OF APPROXIMATELY 575* TO 700* C.
Claim 2
Independent Claim
59 words
THE METHOD OF PREPARING CARBON DISULFIDE COMPRISING CONTACTING HYDROCARBON GAS RICH IN METHANE AND SULFUR IN APPROXIMATELY RICH IN CHIOMETRIC RATIO REQUIRED FOR FORMATION OF HYDROGEN SULFIDE AND CARBON DISULFIDE WITH A SYNTHETIC SILICA-ALUMINA CATALYST CONSISTING ESSENTIALLY OF ABOUT 2 TO 10 PER CENT BY WEIGHT OF SILICA ON ALUMINA AT A TEMPERATURE OF APPROXIMATELY 575* TO 700* C.
References Cited (Backward Citations)
US2330934A
Cited
US2369377A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-08-20 | 1955-02-19 | 1955-08-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-08-20 | 1959-02-19 | 1959-08-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-08-20 | 1963-02-19 | 1963-08-21 | $7700.00 | Window Closed / Lapsed |