US4049654A
Expired / Lapsed
US
⏱️ 0.0 years remaining
2,3,5-Trialkylsubstituted hydroxybenzyl isocyanurates
Assignee: Novartis Corp
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Filing: 1975-07-23
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Granted: 1977-09-20
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Expires: 1995-07-23
Abstract
Abstract The compounds are 2,3,5-trialkylsubstituted hydroxy benzyl isocyanurates having the formula ##STR1## where R a is a 2,3,5-trialkylsubstituted hydroxybenzyl group of the formula II or hydrogen, and R b is a 2,3,5-trialkylsubstituted hydroxybenzyl group of formula II ##STR2## wherein R 1 and R 2 are alkyl or cycloalkyl groups, and R 3 is hydrogen or alkyl One method for making the compounds of this invention is by reacting a 2,3,6-trialkyl-4-(dimethylamino)phenol with cyanuric acid. The compounds are useful as stabilizers of organic materials, especially polyolefins, which deteriorate upon exposure to light and heat.
Inventors
- 👤 John d. Spivack
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 14:55
CPC Classifications
C; C09; C09K; C09K15/00; C09K15/04; C09K15/30; C08; C08K; C08K5/00; C08K5/16; C08K5/34; C08K5/3467; C08K5/3477; C09K15/20; C09K15/24; C10; C10L; C10L1/00; C10L1/10; C10L1/14; C10L1/22; C10M; C10M2207/00; C10M2207/28; C10M2207/281; C10M2207/282; C10M2207/283; C10M2207/286; C10M2207/34; C10M2207/40; C10M2207/402; C10M2207/404; C10M2215/00; C10M2215/22; C10M2215/221; C10M2215/225; C10M2215/226; C10M2215/24; C10M2215/30; C10N; C10N2040/00; C10N2040/20; C10N2040/22
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
4 words
The compound 2,4,6-tris(5-tert.-butyl-2,3-dimethyl-4-hydroxybenzyl) isocyanurate.
Claim 2
Dependent Claim
4 words
The compound 2,4,6-tris(5-tert.-butyl-2,3-dimethyl-4-hydroxybenzyl) isocyanurate.
Claim 3
Dependent Claim
4 words
The compound 2,4,6-tris{(5-(1,1,3,3-tetramethylbutyl)-2,3-dimethyl-4-hydroxybenzyl) isocyanurate.}.
Claim 4
Dependent Claim
4 words
The compound 2,4,6-tris{(5-(1,1,3,3-tetramethylbutyl)-2,3-dimethyl-4-hydroxybenzyl) isocyanurate.}.
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) | 1980-09-19 | 1981-03-21 | 1981-09-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-09-19 | 1985-03-21 | 1985-09-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-09-19 | 1989-03-21 | 1989-09-20 | $7700.00 | Window Closed / Lapsed |