US4386224A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Color stabilization of monoalkyl phenols
Assignee: Monsanto Co
•
Filing: 1981-08-31
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Granted: 1983-05-31
•
Expires: 2001-08-31
Abstract
Abstract A method for stabilizing color, inhibiting color development, and reducing color of monoalkyl phenols by incorporation of N,N-diethylhydroxylamine, preferably from about 5 parts per million to about 50 parts per million. Also a color stabilized monoalkyl phenol composition comprising a monoalkyl phenol and a color stabilizing amount of N,N-diethylhydroxylamine.
Inventors
- 👤 Gerbrand Deetman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 12:22
CPC Classifications
C; C07; C07C; C07C37/00; C07C37/68; C07C37/88
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
23 words
A composition, comprising a monoalkyl phenol with an alkyl group from C 8 to C 13 and a color stabilizing amount of N,N-diethylhydroxylamine.
Claim 2
Dependent Claim
23 words
A composition, comprising a monoalkyl phenol with an alkyl group from C 8 to C 13 and a color stabilizing amount of N,N-diethylhydroxylamine.
Claim 3
Dependent Claim
24 words
The composition of claim 1 in which N,N-diethylhydroxylamine is present from about 5 to about 50 parts per million by weight of monoalkyl phenol.
Claim 4
Dependent Claim
12 words
The composition of claim 1 in which the monoalkyl phenol is nonylphenol.
Claim 5
Dependent Claim
12 words
The composition of claim 1 in which the monoalkyl phenol is dodecylphenol.
Claim 6
Independent Claim
34 words
A method of inhibiting color development in a monoalkylphenol with an alkyl group from C 8 to C 13 , which comprises incorporation of a color stabilizing amount of N,N-diethylhydroxylamine into the monoalkyl phenol.
Claim 7
Independent Claim
34 words
A method of inhibiting color development in a monoalkylphenol with an alkyl group from C 8 to C 13 , which comprises incorporation of a color stabilizing amount of N,N-diethylhydroxylamine into the monoalkyl phenol.
Claim 8
Dependent Claim
31 words
The method of claim 5 in which the N,N-diethylhydroxylamine is added in an amount sufficient to comprise from about 5 to about 50 parts per million by weight of monoalkyl phenol.
Claim 9
Dependent Claim
12 words
The method of claim 5 in which the monoalkyl phenol is nonylphenol.
Claim 10
Dependent Claim
12 words
The method of claim 5 in which the monoalkyl phenol is dodecylphenol.
Claim 11
Independent Claim
40 words
A method of reducing the color of a monoalkyl phenol with an alkyl group from C 8 to C 13 in which color development has occurred, which comprises incorporation of a color reducing amount of N,N-diethylhydroxylamine into the monoalkyl phenol.
Claim 12
Independent Claim
40 words
A method of reducing the color of a monoalkyl phenol with an alkyl group from C 8 to C 13 in which color development has occurred, which comprises incorporation of a color reducing amount of N,N-diethylhydroxylamine into the monoalkyl phenol.
Claim 13
Dependent Claim
31 words
The method of claim 9 in which the N,N-diethylhydroxylamine is incorporated in an amount sufficient to comprise from about 5 to about 50 parts per million by weight of monoalkyl phenol.
Claim 14
Dependent Claim
12 words
The method of claim 9 in which the monoalkyl phenol is nonylphenol.
Claim 15
Dependent Claim
12 words
The method of claim 9 in which the monoalkyl phenol is dodecylphenol.
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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) | 1986-05-30 | 1986-11-29 | 1987-05-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-05-30 | 1990-11-29 | 1991-05-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-05-30 | 1994-11-29 | 1995-05-31 | $7700.00 | Window Closed / Lapsed |