US2965606A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stabilization of polypropylene with combined materials
Assignee: ExxonMobil Technology and Engineering Co
•
Filing: 1959-04-24
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Granted: 1960-12-20
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Expires: 1979-04-24
Abstract
No abstract record available.
Inventors
- 👤 Francis P Ford
- 👤 John R Lovett
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 22:48
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/36; C08K5/37; C08K5/375; C08K5/39
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
73 words
IN A METHOD OF STABILIZING AGAINST OXIDATIVE DEGRADATION AN ALPHA OLEFIN, SOLID POLYPROPYLENE POLYMER, PREPARED IN THE PRESENCE OF A CATALYST CONTAINING A PARTIALLY REDUCED, HEAVY, TRANSITION METAL COMPOUND, THE IMPROVEMENT WHICH COMPRISES INCORPORATING IN THE POLYMER A SYNERGISTIC COMBINATION OF A MINOR AMOUNT OF BOTH ZINC DIBUTYL-DITHIO CARBAMATE AND 4,4''-THIOBIS (3-METHYL6-T-BUTYL PHENOL), EACH OF THESE COMPONENTS BEING UTILIZED IN AN AMOUNT OF FROM .01 TO 2.0 WT. PERCENT BASED ON THE POLYMER.
Claim 2
Dependent Claim
73 words
IN A METHOD OF STABILIZING AGAINST OXIDATIVE DEGRADATION AN ALPHA OLEFIN, SOLID POLYPROPYLENE POLYMER, PREPARED IN THE PRESENCE OF A CATALYST CONTAINING A PARTIALLY REDUCED, HEAVY, TRANSITION METAL COMPOUND, THE IMPROVEMENT WHICH COMPRISES INCORPORATING IN THE POLYMER A SYNERGISTIC COMBINATION OF A MINOR AMOUNT OF BOTH ZINC DIBUTYL-DITHIO CARBAMATE AND 4,4''-THIOBIS (3-METHYL6-T-BUTYL PHENOL), EACH OF THESE COMPONENTS BEING UTILIZED IN AN AMOUNT OF FROM .01 TO 2.0 WT. PERCENT BASED ON THE POLYMER.
References Cited (Backward Citations)
US2841628A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-12-20 | 1964-06-20 | 1964-12-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-12-20 | 1968-06-20 | 1968-12-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-12-20 | 1972-06-20 | 1972-12-20 | $7700.00 | Window Closed / Lapsed |