Patent US3856748A successfully refreshed from Google Patents.
US3856748A
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Compositions stabilized with hydroxyphenyl acylamides
Assignee: Novartis Corp
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Filing: 1973-03-19
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Granted: 1974-12-24
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Expires: 1993-03-19
Abstract
Abstract Hydroxypenyl acylamide compounds having the formula ARE PREPARED BY REACTING AN ALKYL AMINOPHENOL WITH AN ACYL CHLORIDE. These compounds are useful as stabilizers of organic materials which are subject to oxidative deterioration.
Inventors
- 👤 M Dexter
- 👤 M Knell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 10:15
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/16; C08K5/20
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
31 words
A COMPOSITION OF MATTER COMPRISSING POLYPROPYLENE, NATURAL RUBBER OR BUTADIEN -STYRENE ELASTOMER NORMALLY SUBJECT TO OXIDACTIVE DETERIORATION CONTAINING FROM 0.005 TO 5% BY WEIGHT OF A HYDROXYPHENYL ACYLAMIDE HAVING THE FORMULA
Claim 2
Dependent Claim
31 words
A COMPOSITION OF MATTER COMPRISSING POLYPROPYLENE, NATURAL RUBBER OR BUTADIEN -STYRENE ELASTOMER NORMALLY SUBJECT TO OXIDACTIVE DETERIORATION CONTAINING FROM 0.005 TO 5% BY WEIGHT OF A HYDROXYPHENYL ACYLAMIDE HAVING THE FORMULA
Claim 3
Dependent Claim
10 words
The composition of claim 1 wherein said acylamide is N,N''-bis(3,5-di-t-butyl-4-hydroxyphenyl)adipamide.
Claim 4
Dependent Claim
10 words
The composition of claim 1 wherein said acylamide is N,N''-bis(3,5-di-t-butyl-4-hydroxyphenyl)sebacamide.
Claim 5
Dependent Claim
10 words
The composition of claim 1 wherein said acylamide is N,N''-bis(3-methyl-4-hydroxy-5-t-butylphenyl)adipamide.
Claim 6
Dependent Claim
28 words
A composition of matter of claim 1 wherein there is additionally 0.01 to 2% by weight of polyolefin a co-stabilizer selected from dilauryl- Beta -thiodipropionate and distearyl-Beta -distearylthiodipropionate.
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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) | 1977-12-23 | 1978-06-24 | 1978-12-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-12-23 | 1982-06-24 | 1982-12-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-12-23 | 1986-06-24 | 1986-12-24 | $7700.00 | Window Closed / Lapsed |