US3351678A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyolefins stabilized with a combination of phenols and episulfide polymers
Assignee: Hercules LLC
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Filing: 1964-08-12
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Granted: 1967-11-07
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Expires: 1984-08-12
Abstract
No abstract record available.
Inventors
- 👤 Lane F Mcburney
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 11:17
CPC Classifications
C; C08; C08L; C08L23/00; C08L23/02; C08K; C08K5/00; C08K5/04; C08K5/09; C08K5/098; C08L23/10; C08L61/00; C08L61/04; C08L81/00; C08L81/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
121 words
A HIGH MOLECULAR WEIGHT, CRYSTALLINE, STEREOREGULAR POLYMER OF AN A-MONOOLEFIN HAVING AT LEAST 3 CARBON ATOMS CONTAINING AS A STABILIZER THEREFOR STABILIZING AMOUNTS OF A POLYMER OF AN IPISULFIDE OF THE FORMULA 2-R,3-R''-THIIRANE WHERE R IS AN ALKYL RADICAL CONTAINING 1 TO 28 CARBON ATOMS AND R'' IS SELECTED FROM THE GROUP CONSISTING OF HYDROGEN AND METHYL, SAID POLYMER OF AN IPISULFIDE HAVING AN RSV GREATER THAN ABOUT 0.8 AS MEASURED ON A 0.1% SOLUTION IN CHLOROFORM AT 25*C., AND A PHENOLIC ANTIOXIDANT SELECTED FROM THE GROUP CONSISTING OF 2,4,6TRIALKYL PHENOLS, 2-ARALKYL-4,6-DIALKYL PHENOSL, MONO (DIALKYLHYDROXYBENZYL) PHENOLS, DI(DIALKYLHYDROXYBENZYL) PHENOLS, TRI(DIALKYLHYDROXYBENZYL) PHENOLS, POLY (ALKYLPHENOL) SUBSTITUTED HYDROCARBONS, HYDROXYPHENYL POLYALKYL CHROMANS, ADDUCTS OF AN ALKYLPHENOL AND A CYCLIC TERPENE, THIOBIS (ALKYLPHENOL)S, AND HYDROXYPHENOXY SUBSTITUTED TRIAZINES.
Claim 2
Dependent Claim
121 words
A HIGH MOLECULAR WEIGHT, CRYSTALLINE, STEREOREGULAR POLYMER OF AN A-MONOOLEFIN HAVING AT LEAST 3 CARBON ATOMS CONTAINING AS A STABILIZER THEREFOR STABILIZING AMOUNTS OF A POLYMER OF AN IPISULFIDE OF THE FORMULA 2-R,3-R''-THIIRANE WHERE R IS AN ALKYL RADICAL CONTAINING 1 TO 28 CARBON ATOMS AND R'' IS SELECTED FROM THE GROUP CONSISTING OF HYDROGEN AND METHYL, SAID POLYMER OF AN IPISULFIDE HAVING AN RSV GREATER THAN ABOUT 0.8 AS MEASURED ON A 0.1% SOLUTION IN CHLOROFORM AT 25*C., AND A PHENOLIC ANTIOXIDANT SELECTED FROM THE GROUP CONSISTING OF 2,4,6TRIALKYL PHENOLS, 2-ARALKYL-4,6-DIALKYL PHENOSL, MONO (DIALKYLHYDROXYBENZYL) PHENOLS, DI(DIALKYLHYDROXYBENZYL) PHENOLS, TRI(DIALKYLHYDROXYBENZYL) PHENOLS, POLY (ALKYLPHENOL) SUBSTITUTED HYDROCARBONS, HYDROXYPHENYL POLYALKYL CHROMANS, ADDUCTS OF AN ALKYLPHENOL AND A CYCLIC TERPENE, THIOBIS (ALKYLPHENOL)S, AND HYDROXYPHENOXY SUBSTITUTED TRIAZINES.
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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) | 1970-11-06 | 1971-05-08 | 1971-11-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-11-06 | 1975-05-08 | 1975-11-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-11-06 | 1979-05-08 | 1979-11-07 | $7700.00 | Window Closed / Lapsed |