US2745878A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of aromatic thio ethers
Assignee: Universal Oil Products Co
•
Filing: 1952-06-30
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Granted: 1956-05-15
•
Expires: 1972-06-30
Abstract
No abstract record available.
Inventors
- 👤 Julian M Mavity
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 20:19
CPC Classifications
C; C07; C07C; C07C319/00; C07C319/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
47 words
A PROCESS FOR PREPARATION OF AN AROMATIC THIOETHER WHICH COMPRISES CONDENSING AN UNSUBSTITUTED POLYHYDRIC PHENOL IN THE PRESENCE OF A THIOETHERIFICATION CATALYST WITH A COMPOUND CONSISTING OF CARBON, HYDROGEN AND SULFUR AND SELECTED FROM THE GROUP CONSISTING OF ALKYL AND ARYL MERCAPTANS AND DIALKYL AND DIARYL SULFIDES.
Claim 2
Dependent Claim
47 words
A PROCESS FOR PREPARATION OF AN AROMATIC THIOETHER WHICH COMPRISES CONDENSING AN UNSUBSTITUTED POLYHYDRIC PHENOL IN THE PRESENCE OF A THIOETHERIFICATION CATALYST WITH A COMPOUND CONSISTING OF CARBON, HYDROGEN AND SULFUR AND SELECTED FROM THE GROUP CONSISTING OF ALKYL AND ARYL MERCAPTANS AND DIALKYL AND DIARYL SULFIDES.
References Cited (Backward Citations)
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Cited
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Cited
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Cited
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Cited
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Cited
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-05-15 | 1959-11-14 | 1960-05-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-05-15 | 1963-11-14 | 1964-05-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-05-15 | 1967-11-14 | 1968-05-15 | $7700.00 | Window Closed / Lapsed |