US4017544A
Expired / Lapsed
US
⏱️ 0.0 years remaining
N-(nitroalkyl)-N'-phenyl-p-phenylenediamines
Assignee: Monsanto Co
•
Filing: 1975-04-17
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Granted: 1977-04-12
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Expires: 1995-04-17
Abstract
Abstract A method of inhibiting polymerization of unsaturated carboxylic acid esters and improved unsaturated carboxylic acid ester compositions are described. The method comprises, and the compositions are prepared by, incorporating into the ester composition a N-(nitroalkyl)phenylenediamine of the formula ##STR1## in which R is lower alkyl, R' is hydrogen, nitro or lower alkyl and X is hydrogen, lower alkyl or lower alkoxy.
Inventors
- 👤 Darrell Dexter Mullins
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 08:49
CPC Classifications
C; C07; C07C; C07C67/00; C07C67/48; C07C67/62
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
14 words
A compound of the formula ##STR3##in which R and R' are independently lower alkyl.
Claim 2
Dependent Claim
14 words
A compound of the formula ##STR3##in which R and R' are independently lower alkyl.
Claim 3
Dependent Claim
12 words
The compound of claim 1 in which R and R' are methyl.
References Cited (Backward Citations)
US2292212A
Cited
US3322520A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-04-11 | 1980-10-11 | 1981-04-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-04-11 | 1984-10-11 | 1985-04-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-04-11 | 1988-10-11 | 1989-04-12 | $7700.00 | Window Closed / Lapsed |