Patent US3223694A successfully refreshed from Google Patents.
US3223694A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process and catalyst for production of rubbery polymers
Assignee: Phillips Petroleum Co
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Filing: 1962-03-20
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Granted: 1965-12-14
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Expires: 1982-03-20
Abstract
No abstract record available.
Inventors
- 👤 Jr Ralph C Farrar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 13:26
CPC Classifications
C; C08; C08F; C08F136/00; C08F136/02; C08F136/04; C08F136/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
96 words
A METHOD FOR POLYMERIZING A MONOMER SELECTED FROM THE GROUP CONSISTING OF 1,3-BUTADIENE AND ISOPRENE TO FORM A POLYMER CONTAINING AT LEAST 70 PERCENT TRANS, 1,4-ADDITION WHICH COMPRISES CONTACTING SAID MONOMER UNDER POLYMERIZATION CONDITIONS WITH A CATALYST WHICH FORMS ON MIXING COMPONENTS COMPRISING (A) AN ETHER SOLUTION OF LITHIUM ALUMINUM HYDRIDE, (B) TITANIUM TETRACHLORDE, AND (C) BROMINE, WHEREIN THE MOL RATIO OF LITHIUM ALUMINUM HYDRIDE TO TITANIUM TETRACHLORIDE IS IN THE RANGE OF 0.5 TO 6 AND THE MOL RATIO BROMINE TO LITHIUM ALUMINUM HYDRIDE PLUS TITANIUM TETRACHLORIDE IS IN THE RANGE OF 0.1 TO 1.5.
Claim 2
Independent Claim
96 words
A METHOD FOR POLYMERIZING A MONOMER SELECTED FROM THE GROUP CONSISTING OF 1,3-BUTADIENE AND ISOPRENE TO FORM A POLYMER CONTAINING AT LEAST 70 PERCENT TRANS, 1,4-ADDITION WHICH COMPRISES CONTACTING SAID MONOMER UNDER POLYMERIZATION CONDITIONS WITH A CATALYST WHICH FORMS ON MIXING COMPONENTS COMPRISING (A) AN ETHER SOLUTION OF LITHIUM ALUMINUM HYDRIDE, (B) TITANIUM TETRACHLORDE, AND (C) BROMINE, WHEREIN THE MOL RATIO OF LITHIUM ALUMINUM HYDRIDE TO TITANIUM TETRACHLORIDE IS IN THE RANGE OF 0.5 TO 6 AND THE MOL RATIO BROMINE TO LITHIUM ALUMINUM HYDRIDE PLUS TITANIUM TETRACHLORIDE IS IN THE RANGE OF 0.1 TO 1.5.
References Cited (Backward Citations)
GB776326A
Cited
GB848064A
Cited
US2959576A
Cited
US3036056A
Cited
DE1112834B
Cited
BE591994A
Cited
US3066129A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-12-13 | 1969-06-14 | 1969-12-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-12-13 | 1973-06-14 | 1973-12-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-12-13 | 1977-06-14 | 1977-12-14 | $7700.00 | Window Closed / Lapsed |