US2529355A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of dialkyl polysulfides
Assignee: Phillips Petroleum Co
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Filing: 1948-08-23
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Granted: 1950-11-07
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Expires: 1968-08-23
Abstract
No abstract record available.
Inventors
- 👤 Walter A Schulze
- 👤 Willie W Crouch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:48
CPC Classifications
C; C10; C10M; C10M1/00; C10M1/08; C07; C07C; C07C319/00; C07C319/22; C07C319/24; C10L; C10L1/00; C10L1/10; C10L1/14; C10L1/24; C10L1/2406; C10M2219/00; C10M2219/08; C10M2219/082
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
107 words
AN IMPROVED PROCESS FOR CONVERTING A DIALKYL DISULFIDE IN AND WHICH THE ALKYL GROUPS CONTAIN FROM ONE TO SIX CARBON ATOMS INTO THE CORRESPONDING DIALKYL TRISULFIDE WHICH COMPRISES REACTING SAID DISULFIDE WITH ELEMENTAL SULFUR AT A TEMPERATURE BETWEEN 250* AND 350*F. AND PRESSURE SUFFICIENT TO MAINTAIN LIQUID PHASE IN A REACTION ZONE, SEPARATING A RESULTING EFFLUENT INTO UNREACTED DISULFIDE, SAID TRISULFIDE AND A COMPLEX HEAVY RESIDUE, RECYCLING SAID HEAVY RESIDUE AND UNREACTED DISULFIDE TO THE REACTION ZONE, INTRODUCING ADDITIONAL DISULFIDE AND SULFUR, REPEATING THE REACTION, SEPARATION AND RECYCLE FOR A PLURALITY OF CONVERSION CYCLES, AND COLLECTING THE TRISULFIDE FROM EACH CONVERSION AS THE PRODUCT OF THE PROCESS.
References Cited (Backward Citations)
US2237625A
Cited
US2237627A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-11-06 | 1954-05-08 | 1954-11-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-11-06 | 1958-05-08 | 1958-11-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-11-06 | 1962-05-08 | 1962-11-07 | $7700.00 | Window Closed / Lapsed |