US4281192A
Expired / Lapsed
US
⏱️ 0.0 years remaining
N-(2,5-Dihydroxy-3,4,6-trimethyl-benzyl)-acrylamide and-methacrylamide
Assignee: L'Oréal SA
•
Filing: 1979-10-16
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Granted: 1981-07-28
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Expires: 1999-10-16
Abstract
Abstract Unsaturated compounds corresponding to the following formula: ##STR1## in which: R' represents a hydrogen atom or a methyl radical are provided as antioxidant monomers from which antioxidant polymers can be prepared.
Inventors
- 👤 Bernard Jacquet
- 👤 Claude Mahieu
- 👤 Christos Papantoniou
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 18:45
CPC Classifications
C; C08; C08F; C08F220/00; C08F220/02; C08F220/52; C08F220/54; C08F220/58
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
18 words
A compound of the following formula: ##STR4## in which: R' represents a hydrogen atom or a methyl radical.
Claim 2
Dependent Claim
18 words
A compound of the following formula: ##STR4## in which: R' represents a hydrogen atom or a methyl radical.
Claim 3
Dependent Claim
1 words
N-(2,5-Dihydroxy-3,4,6-trimethyl-benzyl)acrylamide.
Claim 4
Dependent Claim
1 words
N-(2,5-Dihydroxy-3,4,6-trimethyl-benzyl)acrylamide.
Claim 5
Dependent Claim
1 words
N-(2,5-Dihydroxy-3,4,6-trimethyl-benzyl)methacrylamide.
Claim 6
Dependent Claim
1 words
N-(2,5-Dihydroxy-3,4,6-trimethyl-benzyl)methacrylamide.
References Cited (Backward Citations)
US2710299A
Cited
GB1132010A
Cited
US3433835A
Cited
US3627831A
Cited
US3780103A
Cited
US4152319A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-07-27 | 1985-01-26 | 1985-07-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-07-27 | 1989-01-26 | 1989-07-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-07-27 | 1993-01-26 | 1993-07-28 | $7700.00 | Window Closed / Lapsed |