US3196137A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polymerization catalysts and process
Assignee: Bridgestone Firestone Inc
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Filing: 1961-06-23
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Granted: 1965-07-20
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Expires: 1981-06-23
Abstract
No abstract record available.
Inventors
- 👤 Alfred R Cain
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 15:34
CPC Classifications
C; C08; C08F; C08F10/00; C08F36/00; C08F36/02; C08F36/04; C08L; C08L61/00; C08L61/04; C08L61/06; C08F110/00; C08F110/04; C08F110/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
106 words
A PROCESS OF POLYMERIZING PROPYLENE WHICH COMPRISES CONTACTING THE SAME WITH A CATALYST COMPRISING (A) A REDUCING AGENT SELECTED FROM THE GROUP CONSISTING OF SODIUM METAL AND SODIUM HYDROCARBONS CONTAINING 1-40 CARBON ATOMS (B) A HALIDE OF A GROUP IV-A METAL, AND (C) A COMPOUND SELECTED FORM THE GROUP CONSISTING OF TETRAKIS-(DIHYDROCARBONAMINO) SILANES AND HEXAKIS-(DIHYDROCARBONAMINO)SILOXANES IN WHICH THE HYDROCARBON GROUPS ATTACHED TO THE NITROGEN ATOMS CONTAIN 1-20 CARBON ATOMS THE AMOUNT OF THE REDUCING AGENT (A) METAL IN THE HALIDE (B), AND THE AMOUNT OF THE SAID SELECTED COMPOUND (C) BEING SUFFICIENT TO PROVIDE .01-5.0 GRAM-ATOMS OF AMINO NITROGEN PER MOL OF THE REDUCING AGENT (A).
Claim 2
Dependent Claim
106 words
A PROCESS OF POLYMERIZING PROPYLENE WHICH COMPRISES CONTACTING THE SAME WITH A CATALYST COMPRISING (A) A REDUCING AGENT SELECTED FROM THE GROUP CONSISTING OF SODIUM METAL AND SODIUM HYDROCARBONS CONTAINING 1-40 CARBON ATOMS (B) A HALIDE OF A GROUP IV-A METAL, AND (C) A COMPOUND SELECTED FORM THE GROUP CONSISTING OF TETRAKIS-(DIHYDROCARBONAMINO) SILANES AND HEXAKIS-(DIHYDROCARBONAMINO)SILOXANES IN WHICH THE HYDROCARBON GROUPS ATTACHED TO THE NITROGEN ATOMS CONTAIN 1-20 CARBON ATOMS THE AMOUNT OF THE REDUCING AGENT (A) METAL IN THE HALIDE (B), AND THE AMOUNT OF THE SAID SELECTED COMPOUND (C) BEING SUFFICIENT TO PROVIDE .01-5.0 GRAM-ATOMS OF AMINO NITROGEN PER MOL OF THE REDUCING AGENT (A).
References Cited (Backward Citations)
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Cited
US2932633A
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Cited
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Cited
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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) | 1968-07-19 | 1969-01-18 | 1969-07-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-07-19 | 1973-01-18 | 1973-07-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-07-19 | 1977-01-18 | 1977-07-20 | $7700.00 | Window Closed / Lapsed |