US3034863A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for preparation of carbon disulphide
Assignee: Shawinigan Chemicals Ltd
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Filing: 1959-03-30
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Granted: 1962-05-15
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Expires: 1979-03-30
Abstract
No abstract record available.
Inventors
- 👤 Herbert S Johnson
- 👤 Reid James
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 22:53
CPC Classifications
C; C01; C01B; C01B32/00; C01B32/70
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
100 words
A PROCESS FOR THE PREPARATION OF CARBON DISULPHIDE WHICH COMPRISES (A) PASSING A STREAM OF GAS COMPISING ELEMENTARY SULPHUR VAPOUR UPWARDLY THROUGH A BED COMPRISING FINELY-DIVIDED ELECTRICALLY CONDUCTIVE PETROLEUM COKE PARTICLES MADE BY THE FLUID COKING PROCESS AND PREVIOUSLY UNOXIDIZED, (B) MAINTAINING THE PARTICLES OF THE BED IN A FLUIDIZED STATE BY THE PASSAGE OF SAID GAS UPWARDLY THERETHROUGH, (C) PASSING AN ELECTRIC CURRENT THROUGH THE RESULTING FLUIDIZED BED WITH SUFFICIENT POWER TO MAINTAIN IT AT A TEMPERATURE IN THE RANGE OF 700* TO 1500* C., AND (D) RECOVERING CARBON DISULPHIDE FROM THE GAS STREAM EMERGING FROM THE FLUIDIZED BED.
Claim 2
Dependent Claim
100 words
A PROCESS FOR THE PREPARATION OF CARBON DISULPHIDE WHICH COMPRISES (A) PASSING A STREAM OF GAS COMPISING ELEMENTARY SULPHUR VAPOUR UPWARDLY THROUGH A BED COMPRISING FINELY-DIVIDED ELECTRICALLY CONDUCTIVE PETROLEUM COKE PARTICLES MADE BY THE FLUID COKING PROCESS AND PREVIOUSLY UNOXIDIZED, (B) MAINTAINING THE PARTICLES OF THE BED IN A FLUIDIZED STATE BY THE PASSAGE OF SAID GAS UPWARDLY THERETHROUGH, (C) PASSING AN ELECTRIC CURRENT THROUGH THE RESULTING FLUIDIZED BED WITH SUFFICIENT POWER TO MAINTAIN IT AT A TEMPERATURE IN THE RANGE OF 700* TO 1500* C., AND (D) RECOVERING CARBON DISULPHIDE FROM THE GAS STREAM EMERGING FROM THE FLUIDIZED BED.
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) | 1965-05-14 | 1965-11-13 | 1966-05-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-05-14 | 1969-11-13 | 1970-05-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-05-14 | 1973-11-13 | 1974-05-15 | $7700.00 | Window Closed / Lapsed |