US3729443A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sulphur-containing antioxidants
Assignee: Novartis Corp
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Filing: 1970-09-09
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Granted: 1973-04-24
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Expires: 1990-09-09
Abstract
Abstract COMPOSITIONS COMPRISING AN ORGANIC POLYMERIC MATERIAL SENSITIVE TO OXIDATION AND SULFUR CONTAINING STERICALLY HINDERED 1,1-BIS-(HYDROXYPHENYL)ALKANS WHICH COMPOUNDS HAVE ANTIOXIDANT PROPERTIES AND SUBSTANTIALLY PROTECT THE ORGANIC POLYMERIC MATERIAL AGAINST OXIDATIVE DEGRADATION. A TYPICAL EMBODIMENT IS A COMPOSITION COMPRISING POLYPROPYLENE AND 1,1-BIS-(2-METHYL-4-HYDROXYPRISING POXY-5-TERRT. B UTYLPHENYL)-3-OCTADECYLTHIOBUTANE IN AN AMOUNT SUFFICIENT TO PROTECT SAID POLYPROPYLENE AGAINST OXIDATIVE DETERIORATION.
Inventors
- 👤 H Peterli
- 👤 H Heller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 13:38
CPC Classifications
C; C09; C09K; C09K15/00; C09K15/04; C09K15/12; C09K15/14; C07; C07C; C07C323/00; C07C37/00; C07C37/11; C07C37/20; C07C47/00; C07C47/02; C07C47/14; C08; C08K; C08K5/00; C08K5/36; C08K5/37; C08K5/375
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-04-23 | 1976-10-23 | 1977-04-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-04-23 | 1980-10-23 | 1981-04-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-04-23 | 1984-10-23 | 1985-04-24 | $7700.00 | Window Closed / Lapsed |