Patent US3258449A successfully refreshed from Google Patents.
US3258449A
Expired / Lapsed
US
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Polyolefins stabilized with 2, 6-ditertiary butyl-p-cresol and organic sulfides
Assignee: Hoechst AG
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Filing: 1960-06-02
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Granted: 1966-06-28
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Expires: 1980-06-02
Abstract
No abstract record available.
Inventors
- 👤 Heuck Claus
- 👤 Mauz Otto
- 👤 Winter Jakob
- 👤 Schulde Felix
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 06:37
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/04; C08K5/13; C08K5/36; C08K5/37; C08K5/372
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
124 words
A COMPOUND OF MATTER COMPRISING (A) 2,6-DITERTIARY-BUTYL-P-CRESOL, (B) AN ORGANO SELECTED FROM THE GROUP CONSISTING OF R-SR'', R-S-(CH2)N-S-R'' AND R-S-CH2CH2-O-CH2CH2-S-R'', WHEREIN R AND R'' ARE ALKYL RADICALS CONTAINING 4 TO 25 CARBON ATOMS AND N IS AN INTEGER FROM 1 TO 4, AND (C) A NORMALLY SOLID POLYMER PREPARED BY REACTING A MEMBER OF THE GROUP CONSISTING OF ETHYLENE, PROPYLENE, BUTENE, METHYLPENTENE AND MIXTURES THEREOF IN THE PRESENCE OF A CATALYST PREPARED FROM A MIXTURE OF AN ORGANO-METALLIC COMPOUND AND A COMPOUND OF A HEAVY METAL SELECTED FROM THE GROUP IVB TO VIB OF THE PERIODIC TABLE, THE TOTAL PHENOL AND SULFIDE COMPOUNDS BEING PRESENT IN AN AMOUNT BY WEIGHT OF 0.001 TO 5% IN A RATIO OF 5:1 TO 1:5 PARTS BY WEIGHT.
Claim 2
Dependent Claim
124 words
A COMPOUND OF MATTER COMPRISING (A) 2,6-DITERTIARY-BUTYL-P-CRESOL, (B) AN ORGANO SELECTED FROM THE GROUP CONSISTING OF R-SR'', R-S-(CH2)N-S-R'' AND R-S-CH2CH2-O-CH2CH2-S-R'', WHEREIN R AND R'' ARE ALKYL RADICALS CONTAINING 4 TO 25 CARBON ATOMS AND N IS AN INTEGER FROM 1 TO 4, AND (C) A NORMALLY SOLID POLYMER PREPARED BY REACTING A MEMBER OF THE GROUP CONSISTING OF ETHYLENE, PROPYLENE, BUTENE, METHYLPENTENE AND MIXTURES THEREOF IN THE PRESENCE OF A CATALYST PREPARED FROM A MIXTURE OF AN ORGANO-METALLIC COMPOUND AND A COMPOUND OF A HEAVY METAL SELECTED FROM THE GROUP IVB TO VIB OF THE PERIODIC TABLE, THE TOTAL PHENOL AND SULFIDE COMPOUNDS BEING PRESENT IN AN AMOUNT BY WEIGHT OF 0.001 TO 5% IN A RATIO OF 5:1 TO 1:5 PARTS BY WEIGHT.
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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) | 1969-06-27 | 1969-12-27 | 1970-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-06-27 | 1973-12-27 | 1974-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-06-27 | 1977-12-27 | 1978-06-28 | $7700.00 | Window Closed / Lapsed |