Patent US2387944A successfully refreshed from Google Patents.
Patent US3567781A successfully refreshed from Google Patents.
US3567781A
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Process for the preparation of poly aromatic ethers and thioethers
Assignee: Monsanto Co
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Filing: 1967-04-24
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Granted: 1971-03-02
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Expires: 1987-04-24
Abstract
Abstract A PROCESS FOR THE PREPARATION OF A GROUP OF COMPOUNDS REPRESENTATIVE OF WHICH ARE POLYPHENYL ETHERS, MIXED POLYPHENYL ETHER-THIOETHERS, PHENOXYBIPHENYLS AND PHENOXYPHENYLMERCAPTOBIPHENYLS COMPRISING THE STEPS OF INTERACTING AN AROMATIC IODO, BROMO OR CHLORO COMPOUND WITH AN ALKALI METAL SALT OF AN AROMATIC HYDROXY COMPOUND IN THE PRESENCE OF CERTAIN DIPOLAR APROTIC SOLVENTS REPRESENTATIVE OF WHICH ARE SEC- AND TERT-AMIDES, PHOSPHORAS AMIDES AND SULFONES. THE ABOVE COMPOUNDS HAVE MANY USES, AMONG WHICH ARE USE AS HYDRAULIC FLUIDS AND JET ENGINE LUBRICANTS.
Inventors
- 👤 Frank S Clark
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 12:11
CPC Classifications
C; C07; C07C; C07C323/00; C10; C10M; C10M3/00; C10M2207/00; C10M2207/04; C10M2209/00; C10M2209/02; C10M2209/10; C10M2211/00; C10M2211/04; C10M2211/042; C10M2211/06; C10M2213/00; C10M2213/04; C10M2213/06; C10M2219/00; C10M2219/08; C10M2219/082; C10M2219/086; C10M2219/087; C10M2219/089; C10M2221/00; C10M2221/02; C10N; C10N2030/00; C10N2030/08; C10N2040/00; C10N2040/08; C10N2040/12; C10N2040/13
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) | 1974-03-01 | 1974-08-31 | 1975-03-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-03-01 | 1978-08-31 | 1979-03-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-03-01 | 1982-08-31 | 1983-03-02 | $7700.00 | Window Closed / Lapsed |