US3758549A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Poly alkanol esters of alkylthio-alkanoic acids
Assignee: Novartis Corp
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Filing: 1971-10-12
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Granted: 1973-09-11
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Expires: 1991-10-12
Abstract
Abstract Alkyl esters derived from alkylthioalkanoic acids and alkane polyols are stabilizers of organic material normally subject to thermal and oxidative deterioration. They are prepared by conventional esterification techniques. Typical embodiments are pentearythritol tetrakis (3-n-dodecylthiopropionate) and ethylene bis (3-n-didecylthiopropionate). The esters are used in conjunction with phenolic antioxidants to effectively stabilize organic materials from the deliterious effects of heat and oxygen.
Inventors
- 👤 M Dexter
- 👤 D Steinberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 21:15
CPC Classifications
C; C10; C10M; C10M3/00; C07; C07C; C07C323/00; C08; C08K; C08K5/00; C08K5/36; C08K5/37; C08K5/372; C09; C09K; C09K15/00; C09K15/04; C09K15/12; C10M2207/00; C10M2207/02; C10M2207/023; C10M2207/024; C10M2207/026; C10M2207/04; C10M2207/046; C10M2207/28; C10M2207/281; C10M2207/282; C10M2207/283; C10M2207/286; C10M2207/287; C10M2207/34; C10M2207/40; C10M2207/402; C10M2207/404; C10M2209/00; C10M2209/10; C10M2209/103; C10M2209/105; C10M2215/00; C10M2215/22; C10M2215/221; C10M2215/222; C10M2219/00; C10M2219/08; C10M2219/082; C10M2219/085; C10M2219/087; C10M2219/088; C10M2219/089; C10M2219/09; C10M2223/00; C10M2223/02; C10M2223/04; C10M2223/042; C10M2223/06; C10M2223/065
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
9 words
The compound of claim 1 which is 1,1,1-trimethylolethane bis(3-n-dodecylthiopropionate).
Claim 2
Dependent Claim
9 words
The compound of claim 1 which is pentaerythritol tetrakis(3-n-dodecylthiopropionate).
References Cited (Backward Citations)
US2601063A
Cited
DE2028240A1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-09-10 | 1977-03-12 | 1977-09-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-10 | 1981-03-12 | 1981-09-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-10 | 1985-03-12 | 1985-09-11 | $7700.00 | Window Closed / Lapsed |