Patent US3081353A successfully refreshed from Google Patents.
US3081353A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the production of methyl mercaptan
Assignee: Montedison SpA
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Filing: 1959-12-23
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Granted: 1963-03-12
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Expires: 1979-12-23
Abstract
No abstract record available.
Inventors
- 👤 Forni Aldo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 11:21
CPC Classifications
C; C07; C07C; C07C321/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
56 words
A PROCESS FOR PREPARING METHYL MERCAPTAN, WHICH COMPRISES PASSING A MIXTURE OF HYDROGEN SULFIDE AND METHANOL VAPORS OVER A CATALIST COMPRISING ANTIMONY SULFIDE PRECIPITATED ON ALUMINA, CONATINING FROM ABOUT 2% TO ABOUT 50% BY WEIGHT ANTIMONY SULFIDE AT A TEMPERATURE BETWEEN ABOUT 200* C. AND ABOUT 400* C., AND RECOVERY METHYL MERCAPTAN FROM THE REACTION PRODUCTS.
Claim 2
Dependent Claim
56 words
A PROCESS FOR PREPARING METHYL MERCAPTAN, WHICH COMPRISES PASSING A MIXTURE OF HYDROGEN SULFIDE AND METHANOL VAPORS OVER A CATALIST COMPRISING ANTIMONY SULFIDE PRECIPITATED ON ALUMINA, CONATINING FROM ABOUT 2% TO ABOUT 50% BY WEIGHT ANTIMONY SULFIDE AT A TEMPERATURE BETWEEN ABOUT 200* C. AND ABOUT 400* C., AND RECOVERY METHYL MERCAPTAN FROM THE REACTION PRODUCTS.
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) | 1966-03-11 | 1966-09-10 | 1967-03-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-03-11 | 1970-09-10 | 1971-03-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-03-11 | 1974-09-10 | 1975-03-12 | $7700.00 | Window Closed / Lapsed |