Patent US2908378A successfully refreshed from Google Patents.
US3662039A
Expired / Lapsed
US
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Process for the production of halogenated methylenediphosphonates
Assignee: Procter and Gamble Co
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Filing: 1968-10-25
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Granted: 1972-05-09
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Expires: 1988-10-25
Abstract
Abstract HALOGENATED METHYLENEDIPHOSPHONATE ESTERS (7 TO 22 CARBON ATOMS IN EACH ESTER GROUP), HALOGENATED MALONATE ESTERS (4-22 CARBON ATOMS IN EACH ESTER GROUP), AND HALOGENATED PHOSPHONOACETATE ESTERS (8 TO 22 CARBON ATOMS IN EACH ESTER GROUP) ARE DISCLOSED, WHEREIN THE HALOGEN IS PRESENT ON THE BRIDGING CARBON ATOM BETWEEN THE ESTER MOIETIES. THE COMPOUNDS HAVE UTILITY AS EXTREME PRESSURE AND ANTI-WATER ADDITIVES FOR LUBRICANT COMPOSITIONS. ALSO DISCLOSED IS A PROCESS FOR PREPARING SAID HALOGENATED ESTERS BY REACTING THE CORRESPONDING UNHALOGENATED ESTERS WITH HYPOHALITE IONS IN AN AQUEOUS REACTION MEDIUM CONTAINING A WATER-MISCIBLE ORGANIC SOLVENT.
Inventors
- 👤 Denzel Allan Nicholson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 14:45
CPC Classifications
C; C10; C10M; C10M137/00; C10M137/12; C07; C07F; C07F9/00; C07F9/02; C07F9/28; C07F9/38; C07F9/40; C07F9/4003; C07F9/4006; C07F9/4025; C10M131/00; C10M131/02; C10M131/04; C10M131/08; C10M131/12; C10M133/00; C10M133/02; C10M133/24; C10M2211/00; C10M2211/04; C10M2211/044; C10M2215/00; C10M2215/20; C10M2215/202; C10M2223/00; C10M2223/02; C10M2223/04; C10M2223/042; C10M2223/06; C10M2223/065
Claims Analysis
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References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-05-09 | 1975-11-08 | 1976-05-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-09 | 1979-11-08 | 1980-05-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-09 | 1983-11-08 | 1984-05-09 | $7700.00 | Window Closed / Lapsed |