Patent US3471427A successfully refreshed from Google Patents.
US3471427A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stabilized polyolefin compositions
Assignee: Hercules LLC
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Filing: 1958-04-04
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Granted: 1969-10-07
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Expires: 1978-04-04
Abstract
No abstract record available.
Inventors
- 👤 David Morrow Dickson Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 20:17
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/04; C08K5/15; C08K5/151; C08K5/1545
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
74 words
A STABILIZED POLYOLEFIN COMPRISING A SOLID POLYMER OF A MONO-OLEFIN CONTAINING AT LEAST 3 CARBON ATOMS, AND AS A STABILIZER THEREFOR FROM 0.01 TO 5% OF A DIALKYL ESTER OF THIODIPROPIONIC ACID IN WHICH EACH ALKYL RADICAL IS OF 1 TO 18 CARBON ATOMS IN COMBINATION WITH FROM 0.01 TO 5% OF A 2(2''-HYDROXPHENYL)-2,4,4-TRIMETHYLCHROMAN IN WHICH EACH AROMATIC RING IS SUBSTITUTED BY FROM 1 TO 3 ALKYL RADICALS OF 1 TO 12 CARBON ATOMS.
Claim 2
Dependent Claim
74 words
A STABILIZED POLYOLEFIN COMPRISING A SOLID POLYMER OF A MONO-OLEFIN CONTAINING AT LEAST 3 CARBON ATOMS, AND AS A STABILIZER THEREFOR FROM 0.01 TO 5% OF A DIALKYL ESTER OF THIODIPROPIONIC ACID IN WHICH EACH ALKYL RADICAL IS OF 1 TO 18 CARBON ATOMS IN COMBINATION WITH FROM 0.01 TO 5% OF A 2(2''-HYDROXPHENYL)-2,4,4-TRIMETHYLCHROMAN IN WHICH EACH AROMATIC RING IS SUBSTITUTED BY FROM 1 TO 3 ALKYL RADICALS OF 1 TO 12 CARBON ATOMS.
Claim 3
Dependent Claim
76 words
A STABILIZED ISOTACTIC POLYPROPYLENE, AND AS A STABILIZER THEREFOR FROM 0.01 TO 2% OF A DIALKYL ESTER OF THIODIPROPIONIC ACID IN WHICH EACH ALKYL RADICAL IS OF 6 TO 18 CARBON ATOMS IN COMBINATION WITH FROM 0.01 TO 2% OF AN ALKYLIDENE-BIS (ALKYLPHENOL) IN WHICH THE ALKYLIDENE RADICAL CONTAINS FROM 1 TO 3 CARBON ATOMS AND IN WHICH EACH AROMATIC RING IS SUBSTITUTED BY FROM 1 TO 2 ALKYL RADICALS OF 1 TO 4 CARBON ATOMS.
Claim 4
Dependent Claim
76 words
A STABILIZED ISOTACTIC POLYPROPYLENE, AND AS A STABILIZER THEREFOR FROM 0.01 TO 2% OF A DIALKYL ESTER OF THIODIPROPIONIC ACID IN WHICH EACH ALKYL RADICAL IS OF 6 TO 18 CARBON ATOMS IN COMBINATION WITH FROM 0.01 TO 2% OF AN ALKYLIDENE-BIS (ALKYLPHENOL) IN WHICH THE ALKYLIDENE RADICAL CONTAINS FROM 1 TO 3 CARBON ATOMS AND IN WHICH EACH AROMATIC RING IS SUBSTITUTED BY FROM 1 TO 2 ALKYL RADICALS OF 1 TO 4 CARBON ATOMS.
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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) | 1972-10-06 | 1973-04-07 | 1973-10-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-10-06 | 1977-04-07 | 1977-10-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-10-06 | 1981-04-07 | 1981-10-07 | $7700.00 | Window Closed / Lapsed |