Patent US1352018A successfully refreshed from Google Patents.
Patent US2809979A successfully refreshed from Google Patents.
US2809979A
Expired / Lapsed
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Organic phosphinodithioic compounds and methods for preparing same
Assignee: Lubrizol Corp
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Filing: 1954-01-26
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Granted: 1957-10-15
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Expires: 1974-01-26
Abstract
No abstract record available.
Inventors
- 👤 Willis G Craig
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 12:26
CPC Classifications
C; C07; C07F; C07F9/00; C07F9/02; C07F9/28; C07F9/30
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
81 words
THE PROCESS FOR THE PREPARATION OF ZINC SALTS OF AROMATIC PHOSPHINODITHIOIC ACIDS WHICH COMPRISES PRE PARING A MIXTURE OF AN AROMATIC COMPOUND SELECTED FROM THE CLASS CONSISTING OF AROMATIC HYDROCARBON ABD HALOGENATED AROMATIC HYDROCARBONS, PHOSPHOROUS PENTASULFIDE, AN ALUMINUM HALIDE SELECTED FROM THE CLASS CONSISTING OF ALUMINUM CHLORIDE AND ALUMINUM BROMIDE, AND A ZINC HALIDE SELECTED FROM THE CLASS CONSISTING OF ZINC CHLORIDE AND ZINC BROMIDE; AND HEATING SAID MIXTURE AT A TEMPERATURE WITHIN THE RANGE OF ABOUT 130*C. TO ABOUT 250*C.
Claim 2
Dependent Claim
81 words
THE PROCESS FOR THE PREPARATION OF ZINC SALTS OF AROMATIC PHOSPHINODITHIOIC ACIDS WHICH COMPRISES PRE PARING A MIXTURE OF AN AROMATIC COMPOUND SELECTED FROM THE CLASS CONSISTING OF AROMATIC HYDROCARBON ABD HALOGENATED AROMATIC HYDROCARBONS, PHOSPHOROUS PENTASULFIDE, AN ALUMINUM HALIDE SELECTED FROM THE CLASS CONSISTING OF ALUMINUM CHLORIDE AND ALUMINUM BROMIDE, AND A ZINC HALIDE SELECTED FROM THE CLASS CONSISTING OF ZINC CHLORIDE AND ZINC BROMIDE; AND HEATING SAID MIXTURE AT A TEMPERATURE WITHIN THE RANGE OF ABOUT 130*C. TO ABOUT 250*C.
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) | 1960-10-14 | 1961-04-15 | 1961-10-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-10-14 | 1965-04-15 | 1965-10-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-10-14 | 1969-04-15 | 1969-10-15 | $7700.00 | Window Closed / Lapsed |