US3361725A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for preparation of solution butyl rubbers using a major amount of air2x and a minor amount of airx2 as catalyst
Assignee: ExxonMobil Technology and Engineering Co
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Filing: 1965-06-02
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Granted: 1968-01-02
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Expires: 1985-06-02
Abstract
No abstract record available.
Inventors
- 👤 Parker Paul Thomas
- 👤 James A Hanan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 10:55
CPC Classifications
C; C08; C08F; C08F210/00; C08F210/04; C08F210/08; C08F210/10; C08F210/12
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
120 words
A PROCESS FOR PREPARING SOLUTION BUTYL RUBBER POLYMERS HAVING VISCOSITY AVERAGE MOLECULAR WEIGHTS >500,000 EQUIVALENT TO THREE MINUTE MOONEY VISCOITIES AT 260*F. OF >40 WHICH COMPRISES REACTING A C4 TO C8 ISOMONOOLEFIN WITH A C4 TO C10 CONJUGATED DIOLEFIN AT TEMPERATURES RANGING FROM ABOUT -110 TO 90*F. IN THE PRESENCE OF A C4 TO C8 PARAFFINIC DILUENT AND A CATALYST MIXTURE COMPOSED OF FROM ABOUT 85 TO ABOUT 99 MOL PERCENT OF A C2 TO C16 DIALKYL ALUMINUM HALIDE COMPONENT WHEREIN EACH ALKYL GROUP CONTAINS FROM 1 TO 8 CARBON ATOMS AND FROM ABOUT 1 TO ABOUT 15 MOL PERCENT OF A C1 TO C8 MONOALKYL ALUMINUM DIHALIDE COMPONENT WHEREIN EACH ALKYL GROUP CONTAINS FROM 1 TO 8 CARBON ATOMS.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-01-01 | 1971-07-03 | 1972-01-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-01-01 | 1975-07-03 | 1976-01-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-01-01 | 1979-07-03 | 1980-01-02 | $7700.00 | Window Closed / Lapsed |