Patent US3076837A successfully refreshed from Google Patents.
US3076837A
Expired / Lapsed
US
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Preparation of diphenyl phthalates
Assignee: Monsanto Chemicals Ltd
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Filing: 1959-09-21
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Granted: 1963-02-05
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Expires: 1979-09-21
Abstract
No abstract record available.
Inventors
- 👤 Robert H Mills
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 08:01
CPC Classifications
C; C07; C07C; C07C67/00; C07C67/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
100 words
IN A PROCESS FOR PRODUCING DIPHENYL PHTHALATES, THE STEPS COMPRISING (1) REACTING A PHENOL SELECTED FROM PHENOL AND ALKYL PHENOL, PHTHALIC ANGYDRIDE AND A TRIALKYLAMINE HAVING A TOTAL NUMBER OF CARBON ATOMS OF NOT MORE THAN ABOUT 24, TO FORM PHENYL TRIALKYLAMMONIUM PHTHALATE, AND (2) THEREAFTER REACTING SAID AMMONIUM PHTHALATE WITH A HALOGENATING AGENT CAPABLE OF REACTING WITH AN ORGANIC ACID GROUP AND SALT THEREOF TO FORM AN ACYL HALIDE AND A PHENOL SELECTED FROM PHENOL AND ALKYL PHENOL, SAID ALKYL PHENOL HAVING FROM 1 TO 2 ALKYL GROUPS WHEREIN EACH ALKYL GROUP HAS FROM 1 TO 18 CARBON ATOMS.
Claim 2
Dependent Claim
100 words
IN A PROCESS FOR PRODUCING DIPHENYL PHTHALATES, THE STEPS COMPRISING (1) REACTING A PHENOL SELECTED FROM PHENOL AND ALKYL PHENOL, PHTHALIC ANGYDRIDE AND A TRIALKYLAMINE HAVING A TOTAL NUMBER OF CARBON ATOMS OF NOT MORE THAN ABOUT 24, TO FORM PHENYL TRIALKYLAMMONIUM PHTHALATE, AND (2) THEREAFTER REACTING SAID AMMONIUM PHTHALATE WITH A HALOGENATING AGENT CAPABLE OF REACTING WITH AN ORGANIC ACID GROUP AND SALT THEREOF TO FORM AN ACYL HALIDE AND A PHENOL SELECTED FROM PHENOL AND ALKYL PHENOL, SAID ALKYL PHENOL HAVING FROM 1 TO 2 ALKYL GROUPS WHEREIN EACH ALKYL GROUP HAS FROM 1 TO 18 CARBON ATOMS.
References Cited (Backward Citations)
US1899919A
Cited
US2862959A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-02-04 | 1966-08-06 | 1967-02-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-02-04 | 1970-08-06 | 1971-02-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-02-04 | 1974-08-06 | 1975-02-05 | $7700.00 | Window Closed / Lapsed |