US3050513A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process and catalyst for production of rubbery polymers
Assignee: Phillips Petroleum Co
•
Filing: 1956-04-20
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Granted: 1962-08-21
•
Expires: 1976-04-20
Abstract
No abstract record available.
Inventors
- 👤 Robert P Zelinski
- 👤 David R Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 20:22
CPC Classifications
C; C08; C08F; C08F36/00; C08F36/02; C08F36/04; B; B28; B28B; B28B1/00; B28B1/29; B28B7/00; B28B7/0064; C08F136/00; C08F136/02; C08F136/04; C08F136/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
56 words
A METHOD FOR POLYMERIZING A MONOMER SELECTED FROM THE GROUP CONSISTING OF 1,3-BUTADIENE AND ISOPRENE WHICH COMPRISES CONTACTING SAID MONOMER UNDER POLYMERIZATION CONDITIONS WITH A CATALYST COMPRISING (A) A COMPLEX ALUMINUM HYDRIDE CORRESPONDING TO THE FORMULA MA1H4, WHEREIN M IS SELECTED FROM THE GROUP CONSISTING OF LITHIUM, SODIUM, POTASSIUM, RUBIDIUM AND CESIUM, AND (B) TITANIUM TETRAIODIDE.
Claim 2
Independent Claim
56 words
A METHOD FOR POLYMERIZING A MONOMER SELECTED FROM THE GROUP CONSISTING OF 1,3-BUTADIENE AND ISOPRENE WHICH COMPRISES CONTACTING SAID MONOMER UNDER POLYMERIZATION CONDITIONS WITH A CATALYST COMPRISING (A) A COMPLEX ALUMINUM HYDRIDE CORRESPONDING TO THE FORMULA MA1H4, WHEREIN M IS SELECTED FROM THE GROUP CONSISTING OF LITHIUM, SODIUM, POTASSIUM, RUBIDIUM AND CESIUM, AND (B) TITANIUM TETRAIODIDE.
References Cited (Backward Citations)
US1058056A
Cited
US2699457A
Cited
US2726231A
Cited
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Cited
US2721189A
Cited
US2832759A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-08-20 | 1966-02-19 | 1966-08-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-08-20 | 1970-02-19 | 1970-08-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-08-20 | 1974-02-19 | 1974-08-21 | $7700.00 | Window Closed / Lapsed |