Patent US3770853A successfully refreshed from Google Patents.
US3770853A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Marshall dann
Assignee: —
•
Filing: 1971-07-06
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Granted: 1973-11-06
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Expires: 1991-07-06
Abstract
Abstract THIS INVENTION RELATES TO A PROCESS FOR PRODUCING MIXTURES OF DITHIOPHOSHORIC ACID TRIESTERS AND TRITHIOPHOSPHORIC ACID TRIESTERS OF THE GENERAL FORMULA: S=P(-S-R1)(-Q)-O-C(-R2)(-R3)-O-R4 IN WHICH Q IS THE GROUP-SR OR -O-C(-R2)(-R3)-O-R4 R1 AND R4 ARE SELECTED FROM THE GROUP CONSISTING OF ALKYL AND ARYL GROUPS, AND R2 AND R3 ARE SELECTED FROM THE GROUP CONSISTING OF HYDROGEN AND ALKYL AND ARYL GROUPS, BY REACTING PHOSPHORUS PENTASULFIDE AT A TEMPERATURE IN THE RANGE OF ABOUT 80 TO ABOUT 110*C AND IN A MOLAR RATIO OF 1:>3 WITH A COMPOUND HAVING A FORMULA 1: R1-O-C(-R2)(-R3)-O-R4 IN WHICH R1, R2, R3, AND R4 ARE AS GIVEN ABOVE.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 09:30
CPC Classifications
A; A01; A01N; A01N57/00; A01N57/10; C; C07; C07F; C07F9/00; C07F9/02; C07F9/06; C07F9/16; C07F9/165; C07F9/1651
Claims Analysis
Total Claims: 0
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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) | 1976-11-05 | 1977-05-07 | 1977-11-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-11-05 | 1981-05-07 | 1981-11-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-11-05 | 1985-05-07 | 1985-11-06 | $7700.00 | Window Closed / Lapsed |