US2968650A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Interpolymerizations of ethylene and butadiene
Assignee: EIDP Inc
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Filing: 1954-10-15
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Granted: 1961-01-17
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Expires: 1974-10-15
Abstract
No abstract record available.
Inventors
- 👤 Baxter Warren Nesmith
- 👤 Robinson Ivan Maxwell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 23:01
CPC Classifications
C; C08; C08F; C08F36/00; C08F36/02; C08F10/00; C08F10/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
72 words
A PROCESS FOR THE PREPARATION OF ETHYLENE-BUTADIENE INTERPOLYMERS WHICH COMPRISES CONTACTING ETHYLENE AND BUTADIENE IN THE PRESENCE OF AN INERT, LIQUID HYDROCARBON MEDIUM WITH FROM 0.001 TO 10%, ON THE BASIS OF THE MONOMER, OF A CATALYST CONTAINING TITANIUM AT A VALENCE STATE OF TWO OBTAINED BY CONTACTING REDUCIBLE TITANIUM HAVING A VALENCE ABOVE TWO WITH SUFFICIENT QUANTITY OF A REDUCING AGENT TO REDUCE THE TITANIUM TO A VALENCE STATE OF TWO.
Claim 2
Dependent Claim
72 words
A PROCESS FOR THE PREPARATION OF ETHYLENE-BUTADIENE INTERPOLYMERS WHICH COMPRISES CONTACTING ETHYLENE AND BUTADIENE IN THE PRESENCE OF AN INERT, LIQUID HYDROCARBON MEDIUM WITH FROM 0.001 TO 10%, ON THE BASIS OF THE MONOMER, OF A CATALYST CONTAINING TITANIUM AT A VALENCE STATE OF TWO OBTAINED BY CONTACTING REDUCIBLE TITANIUM HAVING A VALENCE ABOVE TWO WITH SUFFICIENT QUANTITY OF A REDUCING AGENT TO REDUCE THE TITANIUM TO A VALENCE STATE OF TWO.
References Cited (Backward Citations)
FR826993A
Cited
US2200429A
Cited
US2440498A
Cited
US2491116A
Cited
US2905645A
Cited
US2721189A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-01-17 | 1964-07-18 | 1965-01-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-01-17 | 1968-07-18 | 1969-01-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-01-17 | 1972-07-18 | 1973-01-17 | $7700.00 | Window Closed / Lapsed |