US3299146A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of dimethyl disulfide
Assignee: Pennwalt Corp
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Filing: 1964-03-26
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Granted: 1967-01-17
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Expires: 1984-03-26
Abstract
No abstract record available.
Inventors
- 👤 Leslie A Gillette
- 👤 Martin Le Roy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 00:22
CPC Classifications
C; C07; C07C; C07C319/00; C07C319/22; C07C319/24
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
49 words
A PROCESS FOR PREPARING DIMETHYL DISULFIDE WHICH COMPRISES REACTING METHYL MERCAPTAN WITH DIMETHYL TRISULFIDE IN THE PRESENCE OF A BASIC CATALYST SELECTED FROM THE GROUP CONSISTING OF ALKALI METAL HYDROXIDES, ALKALINE EARTH METAL OXIDES AND HYDROXIDES, AND TERTIARY ALIPHATIC AMINES AND AFTER REACTION IS COMPLETE REMOVING THE VOLATILE BY-PRODUCT.
Claim 2
Dependent Claim
49 words
A PROCESS FOR PREPARING DIMETHYL DISULFIDE WHICH COMPRISES REACTING METHYL MERCAPTAN WITH DIMETHYL TRISULFIDE IN THE PRESENCE OF A BASIC CATALYST SELECTED FROM THE GROUP CONSISTING OF ALKALI METAL HYDROXIDES, ALKALINE EARTH METAL OXIDES AND HYDROXIDES, AND TERTIARY ALIPHATIC AMINES AND AFTER REACTION IS COMPLETE REMOVING THE VOLATILE BY-PRODUCT.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-01-16 | 1970-07-18 | 1971-01-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-01-16 | 1974-07-18 | 1975-01-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-01-16 | 1978-07-18 | 1979-01-17 | $7700.00 | Window Closed / Lapsed |