Patent US2665294A successfully refreshed from Google Patents.
US2665294A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thioamyl ester of diphenyldithiophosphinic acid and process therefor
Assignee: Monsanto Chemicals Ltd
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Filing: 1952-03-12
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Granted: 1954-01-05
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Expires: 1972-03-12
Abstract
No abstract record available.
Inventors
- 👤 Gennady M Kosolapoff
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 15:29
CPC Classifications
C; C10; C10M; C10M137/00; C10M137/12; C10M137/14; C07; C07F; C07F9/00; C07F9/02; C07F9/28; C07F9/30; C07F9/32; C10M2223/00; C10M2223/06; C10M2223/061; C10M2223/065; C10N; C10N2050/00; C10N2050/10
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
6 words
THE THIOAMYL ESTER OF DIPHENYLDITHIOPHOSPHINIC ACID.
Claim 2
Dependent Claim
6 words
THE THIOAMYL ESTER OF DIPHENYLDITHIOPHOSPHINIC ACID.
Claim 3
Independent Claim
65 words
THE METHOD OF PREPARING THE THIOAMYL ESTER OF DIPHENYLDITHIOPHOSPHINIC ACID WHICH COMPRISES HEATING BENZENE WITH PHOSPHORUS TRICHLORIDE, CHLORINATING THE REACTING PRODUCT THEREFROM WITH ELEMENTAL CHLORINE, THEREAFTER ESTERIFYING WITH AMYL MERCAPTAN TO OBTAIN A MIXTURE OF THE THIOAMYL ESTER OF BENZENEDITHIOPHOSPHONIC ACID AND THE THIOAMYL ESTER OF DIPHENYLDITHIOPHOSPHINIC ACID, AND DISTILLING OFF THE THIOAMYL ESTER OF BENZENEDITHIOPHOSPHONIC ACID TO OBTAIN THE THIOAMYL ESTER OF DIPHENYLDITHIOPHOSPHINIC ACID.
Claim 4
Independent Claim
65 words
THE METHOD OF PREPARING THE THIOAMYL ESTER OF DIPHENYLDITHIOPHOSPHINIC ACID WHICH COMPRISES HEATING BENZENE WITH PHOSPHORUS TRICHLORIDE, CHLORINATING THE REACTING PRODUCT THEREFROM WITH ELEMENTAL CHLORINE, THEREAFTER ESTERIFYING WITH AMYL MERCAPTAN TO OBTAIN A MIXTURE OF THE THIOAMYL ESTER OF BENZENEDITHIOPHOSPHONIC ACID AND THE THIOAMYL ESTER OF DIPHENYLDITHIOPHOSPHINIC ACID, AND DISTILLING OFF THE THIOAMYL ESTER OF BENZENEDITHIOPHOSPHONIC ACID TO OBTAIN THE THIOAMYL ESTER OF DIPHENYLDITHIOPHOSPHINIC ACID.
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) | 1957-01-04 | 1957-07-06 | 1958-01-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-01-04 | 1961-07-06 | 1962-01-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-01-04 | 1965-07-06 | 1966-01-05 | $7700.00 | Window Closed / Lapsed |