US3056759A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polypropylene stabilized with di-tert.-octyl tri- and tetrasulfides
Assignee: ExxonMobil Technology and Engineering Co
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Filing: 1958-08-21
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Granted: 1962-10-02
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Expires: 1978-08-21
Abstract
No abstract record available.
Inventors
- 👤 Philip L Mercier
- 👤 Lawrence T Eby
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 21:06
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/36; C08K5/37; C08K5/372
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
61 words
A METHOD OF STABILIZING AGAINST THERMAL DEGRADATION A POLYPROPYLENE, SOLID HYDROCARBON POLYMER PREPARED IN THE PRESENCE OF A CATALYST CONTAINING A PARTIALLY REDUCED, HEAVY, TRANSITION METAL HALIDE WHICH COMPRISES INCORPORATING IN THE POLYMER, IN AN AMOUNT OF FROM 0.1 TO 1 WT. PERCENT BASED ON THE POLYMER, A DIALKYL POLYSULFIDE SELECTED FROM THE GROUP CONSISTING OF DI-TERT.-OCTYL TRISULFIDE AND DI-TERT.-OCTYL TETRASULFIDE.
Claim 2
Independent Claim
61 words
A METHOD OF STABILIZING AGAINST THERMAL DEGRADATION A POLYPROPYLENE, SOLID HYDROCARBON POLYMER PREPARED IN THE PRESENCE OF A CATALYST CONTAINING A PARTIALLY REDUCED, HEAVY, TRANSITION METAL HALIDE WHICH COMPRISES INCORPORATING IN THE POLYMER, IN AN AMOUNT OF FROM 0.1 TO 1 WT. PERCENT BASED ON THE POLYMER, A DIALKYL POLYSULFIDE SELECTED FROM THE GROUP CONSISTING OF DI-TERT.-OCTYL TRISULFIDE AND DI-TERT.-OCTYL TETRASULFIDE.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-10-01 | 1966-04-02 | 1966-10-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-10-01 | 1970-04-02 | 1970-10-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-10-01 | 1974-04-02 | 1974-10-02 | $7700.00 | Window Closed / Lapsed |