US3067187A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polymerization of conjugated diolefins with an alfin catalyst and a dihydroaromatic molecular weight regulator
Assignee: NAT DISTIFFERS AND CHEMICAL CO
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Filing: 1960-05-16
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Granted: 1962-12-04
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Expires: 1980-05-16
Abstract
No abstract record available.
Inventors
- 👤 Greenberg Harry
- 👤 Virgil L Hansley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 22:58
CPC Classifications
C; C08; C08F; C08F12/00; C08F12/02; C08F12/04; C08F12/06; C08F12/08; C08F36/00; C08F36/02; C08F36/04; C08F4/00; C08F4/06; C08F4/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
70 words
IN A PROCESS FOR PREPARING A POLYMER OF A CONJUGATED DIOLEFINIC HYDROCARBON IN THE PRESENCE OF AN ALFIN CATALYST CONSISTING ESSENTIALLY OF A SODIUM ALKOXIDE, A SODIUM. ALKENYL COMPOUND, AND AN ALALI METAL HALIDE, THE IMPROVEMENT WHICH COMPRISES CARRYING OUT SAID POLYMERIZATION IN THE PRESENCE OF A DIHYDRO AROMATIC HYDROCARBON SELECTED FROM THE GROUP CONSISTING OF 1,2-DIHYDROBENZENE, 1,4-DIHYDROBENZENE, 1,4-DIHYDRONAPHTHALENE, DIHYROTOLUENE, AND DIHYDROXYLENE TO CONTROL THE MOLECULAR WEIGHT OF THE POLYMER.
Claim 2
Dependent Claim
70 words
IN A PROCESS FOR PREPARING A POLYMER OF A CONJUGATED DIOLEFINIC HYDROCARBON IN THE PRESENCE OF AN ALFIN CATALYST CONSISTING ESSENTIALLY OF A SODIUM ALKOXIDE, A SODIUM. ALKENYL COMPOUND, AND AN ALALI METAL HALIDE, THE IMPROVEMENT WHICH COMPRISES CARRYING OUT SAID POLYMERIZATION IN THE PRESENCE OF A DIHYDRO AROMATIC HYDROCARBON SELECTED FROM THE GROUP CONSISTING OF 1,2-DIHYDROBENZENE, 1,4-DIHYDROBENZENE, 1,4-DIHYDRONAPHTHALENE, DIHYROTOLUENE, AND DIHYDROXYLENE TO CONTROL THE MOLECULAR WEIGHT OF THE POLYMER.
References Cited (Backward Citations)
US2559947A
Cited
US2841574A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-12-03 | 1966-06-04 | 1966-12-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-12-03 | 1970-06-04 | 1970-12-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-12-03 | 1974-06-04 | 1974-12-04 | $7700.00 | Window Closed / Lapsed |