US3941746A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Containing hindered phenolic norbornane-2,3-dicarboximides stabilized compositions
Assignee: Novartis Corp
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Filing: 1975-05-30
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Granted: 1976-03-02
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Expires: 1995-05-30
Abstract
Abstract Compounds having the formula ##SPC1## Wherein R 1 and R 2 are lower alkyl, X and Y are hydrogen or, when taken together, they form a bond or an ether linkage, m is 0 to 3, and n is 0 to 2, are good ultraviolet light stabilizers for synthetic polymers.
Inventors
- 👤 John F. Stephen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 17:47
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/16; C08K5/34; C08K5/3412; C08K5/3415; C08K5/3417; C07; C07D; C07D209/00; C07D209/56; C07D209/58; C07D209/70; C07D209/72; C07D209/76; C09; C09K; C09K15/00; C09K15/04; C09K15/30
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
97 words
A composition of matter comprising a. an organic material normally subject to degradation, b. from 0.01 to 5% of a stabilizer of the formula ##SPC5## wherein R 1 and R 2 are the same or different (lower) alkyl groups of 1 to 4 carbon atoms, X and Y are hydrogen or, when taken together, they form a bond or an ether linkage, m has a value of 0 to 3, and n has a value of 0 to 2. c. from 0 to 5% of a UV absorber, and d. from 0 to 5% of a co-stabilizer.
Claim 2
Dependent Claim
97 words
A composition of matter comprising a. an organic material normally subject to degradation, b. from 0.01 to 5% of a stabilizer of the formula ##SPC5## wherein R 1 and R 2 are the same or different (lower) alkyl groups of 1 to 4 carbon atoms, X and Y are hydrogen or, when taken together, they form a bond or an ether linkage, m has a value of 0 to 3, and n has a value of 0 to 2. c. from 0 to 5% of a UV absorber, and d. from 0 to 5% of a co-stabilizer.
Claim 3
Dependent Claim
11 words
A composition of claim 1, wherein the organic material is polyolefin.
Claim 4
Dependent Claim
16 words
A composition of claim 2, wherein in the stabilizer R 1 and R 2 are tert-butyl.
Claim 5
Dependent Claim
11 words
A composition of claim 3 wherein the organic material is polypropylene.
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) | 1979-03-02 | 1979-09-01 | 1980-03-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-03-02 | 1983-09-01 | 1984-03-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-03-02 | 1987-09-01 | 1988-03-02 | $7700.00 | Window Closed / Lapsed |