US2919296A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of obtaining tetrachlorethylene and tetrachloride of carbon
Assignee: Societe dElectro Chimie dElectro Metallurgie et des Acieries Electriques Dugine SA SECEMAU
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Filing: 1957-03-15
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Granted: 1959-12-29
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Expires: 1977-03-15
Abstract
No abstract record available.
Inventors
- 👤 Thermet Robert
- 👤 Parvi Ludovic
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 08:31
CPC Classifications
C; C07; C07C; C07C21/00; C07C21/02; C07C21/04; C07C21/12; B; B01; B01J; B01J8/00; B01J8/18; B01J8/24; C07C17/00; C07C17/361; C07C19/00; C07C19/01; C07C19/03; C07C19/041; B01J2208/00; B01J2208/00008; B01J2208/00017; B01J2208/00106; B01J2208/00168; B01J2208/00176
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
130 words
A METHOD OF STIMULTANEOUS MANUFACTURE OF TETRACHLORETHYLENE AND CARBON TETACHLORIDE IN THE GASEOUS PHASE, WHICH COMPRISES PASSING THROUGH A FLUIDIZED BED OF GRANULAR MATERIAL IN A REACTION ZONE MAINTAINED AT A TEMPERATURE BETWEEN ABOUT 485* C. AND 250* C. IN A REACTION CHAMBER, A GASEOUS MIXTURE OF CHLORINE, PROPANE, HEXACHLORETHANE AND A DILUENT, SAID DILUENT BEING SELECTED FROM THE GROUP CONSISTING OF TETRACHLORETHYLENE, CARBON TETRACHLORIDE AND MIXTURES THEREOF , THE QUANTY OF SAID DILUENT BEING AT LEAST EQUAL TO THAT WHICH PREVENT THE MIXTURE FROM BEING EXPLOSIVE AND AT MOST EQUAL TO THAT WHICH CORRESPONDS TO AN ADIABATIC EVOLUTION OF THE REACTION, THEREBY CONVERTING PROPANE INTO TETRACHLORETHYLENE AND CARBON TETRACHLORIDE WITH THE LIBERATION OF HEAT AND CONVERTING HEXACHLORETHANE INTO TETRACHLORETHYLENE AND FREE CHLORINE WITH THE ABSORPTION OF HEAT, COOLING THE
Claim 2
Independent Claim
130 words
A METHOD OF STIMULTANEOUS MANUFACTURE OF TETRACHLORETHYLENE AND CARBON TETACHLORIDE IN THE GASEOUS PHASE, WHICH COMPRISES PASSING THROUGH A FLUIDIZED BED OF GRANULAR MATERIAL IN A REACTION ZONE MAINTAINED AT A TEMPERATURE BETWEEN ABOUT 485* C. AND 250* C. IN A REACTION CHAMBER, A GASEOUS MIXTURE OF CHLORINE, PROPANE, HEXACHLORETHANE AND A DILUENT, SAID DILUENT BEING SELECTED FROM THE GROUP CONSISTING OF TETRACHLORETHYLENE, CARBON TETRACHLORIDE AND MIXTURES THEREOF , THE QUANTY OF SAID DILUENT BEING AT LEAST EQUAL TO THAT WHICH PREVENT THE MIXTURE FROM BEING EXPLOSIVE AND AT MOST EQUAL TO THAT WHICH CORRESPONDS TO AN ADIABATIC EVOLUTION OF THE REACTION, THEREBY CONVERTING PROPANE INTO TETRACHLORETHYLENE AND CARBON TETRACHLORIDE WITH THE LIBERATION OF HEAT AND CONVERTING HEXACHLORETHANE INTO TETRACHLORETHYLENE AND FREE CHLORINE WITH THE ABSORPTION OF HEAT, COOLING THE
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) | 1962-12-28 | 1963-06-29 | 1963-12-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-12-28 | 1967-06-29 | 1967-12-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-12-28 | 1971-06-29 | 1971-12-29 | $7700.00 | Window Closed / Lapsed |