US2905705A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the manufacture of trialkyl phosphites
Assignee: BASF Schweiz AG
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Filing: 1957-07-05
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Granted: 1959-09-22
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Expires: 1977-07-05
Abstract
No abstract record available.
Inventors
- 👤 Kohler Paul
- 👤 Porret Daniel
- 👤 Tetaz Felix
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 08:39
CPC Classifications
C; C07; C07F; C07F9/00; C07F9/02; C07F9/06; C07F9/08; C07F9/141; C07F9/142
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
71 words
A PROCESS FOR THE MANUFACTURE OF TRIALKYL PHOSPHITES BY REACTION OF PHOSPHORUS TRICHLORIDE WITH LOW-MOLECULAR ALIPHATIC ALCOHOLS IN THE PRESENCE OF A TERTIARY AMINE AND AN INERT SOLVENT, WHEREIN THE REACTION MIXTURE IS RECYCLED AND THE SOLID AMINE HYDROCHLORIDE FORMED SEPARATED CONTINUOUSLY FROM THE REACTION MIXTURE, THE PRECAUTION BEING TAKEN THAT IN THIS OPERATION THE QUANTITY OF THE AMINE HYDROCHLORIDE FORMED WHICH IS PRESENT IN THE REACTION MIXTURE ALWAYS REMAINS SMALL.
Claim 2
Dependent Claim
71 words
A PROCESS FOR THE MANUFACTURE OF TRIALKYL PHOSPHITES BY REACTION OF PHOSPHORUS TRICHLORIDE WITH LOW-MOLECULAR ALIPHATIC ALCOHOLS IN THE PRESENCE OF A TERTIARY AMINE AND AN INERT SOLVENT, WHEREIN THE REACTION MIXTURE IS RECYCLED AND THE SOLID AMINE HYDROCHLORIDE FORMED SEPARATED CONTINUOUSLY FROM THE REACTION MIXTURE, THE PRECAUTION BEING TAKEN THAT IN THIS OPERATION THE QUANTITY OF THE AMINE HYDROCHLORIDE FORMED WHICH IS PRESENT IN THE REACTION MIXTURE ALWAYS REMAINS SMALL.
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) | 1962-09-21 | 1963-03-23 | 1963-09-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-09-21 | 1967-03-23 | 1967-09-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-09-21 | 1971-03-23 | 1971-09-22 | $7700.00 | Window Closed / Lapsed |