Patent US2913495A successfully refreshed from Google Patents.
US2913495A
Expired / Lapsed
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Stabilization of arylamines
Assignee: Union Carbide Corp
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Filing: 1957-03-25
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Granted: 1959-11-17
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Expires: 1977-03-25
Abstract
No abstract record available.
Inventors
- 👤 William F Goldsmith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 10:39
CPC Classifications
C; C07; C07C; C07C209/00; C07C209/82; C07C209/90
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
95 words
A PROCESS FOR THE STABILIZATION OF AN ARYLAMINE SELECTED FROM THE GROUP CONSISTING OF ANILINE, PHENYLENE DIAMINE, NAPHTHYLAMINE, NAPHTHYL DIAMINES AND RINGSUBSTITUTED ARYLAMINES OF THE ABOVE CLASSES WHEREIN THE ONLY SUBSTITUTED ARE SELECTED FROM THE GROUP CONSISTING OF LOWER ALKYL, LOWER ALKOXY AND HALOGEN SUBSTITUENTS, WHICH COMPRISES ADDING TO SAID ARYLAMINE A SUFFICIENT QUANTITY OF DIKETENE TO FORM IN SITU, BY THE REACTION OF SAID DIKETENE WITH A PORTION OF SAID ARYLAMINE, AN ACETOACETARYLAMIDE IN THE AMOUNT OF AT LEAST 0.01 PART BY WEIGHT OF SAID ACETOACETRYLAMIDE PER 100 PARTS BY WEIGHT OF UNRECATED ARYLAMINE.
Claim 2
Dependent Claim
95 words
A PROCESS FOR THE STABILIZATION OF AN ARYLAMINE SELECTED FROM THE GROUP CONSISTING OF ANILINE, PHENYLENE DIAMINE, NAPHTHYLAMINE, NAPHTHYL DIAMINES AND RINGSUBSTITUTED ARYLAMINES OF THE ABOVE CLASSES WHEREIN THE ONLY SUBSTITUTED ARE SELECTED FROM THE GROUP CONSISTING OF LOWER ALKYL, LOWER ALKOXY AND HALOGEN SUBSTITUENTS, WHICH COMPRISES ADDING TO SAID ARYLAMINE A SUFFICIENT QUANTITY OF DIKETENE TO FORM IN SITU, BY THE REACTION OF SAID DIKETENE WITH A PORTION OF SAID ARYLAMINE, AN ACETOACETARYLAMIDE IN THE AMOUNT OF AT LEAST 0.01 PART BY WEIGHT OF SAID ACETOACETRYLAMIDE PER 100 PARTS BY WEIGHT OF UNRECATED ARYLAMINE.
Claim 3
Dependent Claim
53 words
A PROCESS FOR STABILIZATION OF ORTHO-ANISIDINE WHICH COMPRISES ADDING TO SAID ORTHO-ANISIDIEN A SUFFICIEN QUANTITY OF DIKETENE TO FORM IN SITU, BY THE REACTION OF SAID DEKETENE WITH A PORTION OF SAID ORTHO-ANISIDINE, ACETOACET-ORTHO-ANISIDIDE IN THE AMOUNT OF AT LEAST 0.01 PART BY WEIGHT OF ACETOACET-ORTHO-ANISIDIDE PER 100 PARTS BY WEIGHT OF ORTHO-ANISIDINE.
Claim 4
Dependent Claim
53 words
A PROCESS FOR STABILIZATION OF ORTHO-ANISIDINE WHICH COMPRISES ADDING TO SAID ORTHO-ANISIDIEN A SUFFICIEN QUANTITY OF DIKETENE TO FORM IN SITU, BY THE REACTION OF SAID DEKETENE WITH A PORTION OF SAID ORTHO-ANISIDINE, ACETOACET-ORTHO-ANISIDIDE IN THE AMOUNT OF AT LEAST 0.01 PART BY WEIGHT OF ACETOACET-ORTHO-ANISIDIDE PER 100 PARTS BY WEIGHT OF ORTHO-ANISIDINE.
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) | 1962-11-16 | 1963-05-18 | 1963-11-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-11-16 | 1967-05-18 | 1967-11-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-11-16 | 1971-05-18 | 1971-11-17 | $7700.00 | Window Closed / Lapsed |