Patent US3005003A successfully refreshed from Google Patents.
US3005003A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manufacture of organic phosphorus compounds
Assignee: Minister of Supply In Her Majesty S Government
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Filing: 1955-03-31
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Granted: 1961-10-17
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Expires: 1975-03-31
Abstract
No abstract record available.
Inventors
- 👤 Ford-Moore Arthur Henry
- 👤 Wood Geoffrey William
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 05:21
CPC Classifications
C; C07; C07F; C07F9/00; C07F9/02; C07F9/06; C07F9/16; C07F9/165; C07F9/1651
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
75 words
PROCESS FOR PRODUCING A LOWER ALKYL PHOSPHOROTHIOLATE WHICH COMPRISES TRANSESTERIFYING A LOWER TRIALKYL PHOSPHITE WITH AN ALKYL THIOALKANOL HAVING LOWER ALKYKL GROUPS IN THE PRESENCE OF A DIALKYL HYDROGEN PHOSPHITE CATALYST AT A TEMPERATURE OF ABOUT 145 TO 150*C., REACTING THE RESULTING LOWER TRIALKYL PHOSPHITE ESTER WITH ELEMENTAL SULFUR TO PRODUCE THE LOWER TRIALKYL PHOSPHOROTHIONATE, ISOMERIZING THE LATTER IN THE PRESENCE OF AN ALKALI METAL ALCOHOLATE AT ABOUT 130*C. TO FORM THE LOWER TRIALKYL PHOSPHOROTHIOLATE.
Claim 2
Dependent Claim
75 words
PROCESS FOR PRODUCING A LOWER ALKYL PHOSPHOROTHIOLATE WHICH COMPRISES TRANSESTERIFYING A LOWER TRIALKYL PHOSPHITE WITH AN ALKYL THIOALKANOL HAVING LOWER ALKYKL GROUPS IN THE PRESENCE OF A DIALKYL HYDROGEN PHOSPHITE CATALYST AT A TEMPERATURE OF ABOUT 145 TO 150*C., REACTING THE RESULTING LOWER TRIALKYL PHOSPHITE ESTER WITH ELEMENTAL SULFUR TO PRODUCE THE LOWER TRIALKYL PHOSPHOROTHIONATE, ISOMERIZING THE LATTER IN THE PRESENCE OF AN ALKALI METAL ALCOHOLATE AT ABOUT 130*C. TO FORM THE LOWER TRIALKYL PHOSPHOROTHIOLATE.
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) | 1964-10-16 | 1965-04-17 | 1965-10-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-10-16 | 1969-04-17 | 1969-10-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-10-16 | 1973-04-17 | 1973-10-17 | $7700.00 | Window Closed / Lapsed |