US3352934A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Use of hydrogen as a molecular weight control in alkali-metal polymerization of diolefins
Assignee: ExxonMobil Technology and Engineering Co
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Filing: 1964-11-06
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Granted: 1967-11-14
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Expires: 1984-11-06
Abstract
No abstract record available.
Inventors
- 👤 House William Thomas
- 👤 Ray Richard Louia
- 👤 Hoover Wayne
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 11:02
CPC Classifications
C; C07; C07C; C07C2/00; C07C2/02; C07C2523/00; C07C2523/02; C07C2523/04
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
82 words
IN A PROCESS FOR PRODUCING A LIQUID POLYMER OIL WHICH COMPRISES CHARGING A MIXTURE OF 50 TO 100 PARTS OF CONJUGATED DIOLEFIN, 50 TO 0 PARTS OF A VINYL AROMATIC HYDROCARBON, ABOUT 1 TO 100 PARTS OF AN ETHER HAVING 2 TO 8 CARBON ATOMS CHOOSEN FROM THE GROUP OF ALKYL ETHERS AND CYCLIC DIETHERS HAVING THE OXYGEN ATOMS SEPARATED BY AT LEAST TWO CARBON ATOMS AND ABOUT 1.0 TO 2.0 PARTS BY WEIGHT OF FINELY DIVIDED ALKALI METAL CATALYST, ALL BASED
References Cited (Backward Citations)
US3058973A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-11-13 | 1971-05-15 | 1971-11-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-11-13 | 1975-05-15 | 1975-11-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-11-13 | 1979-05-15 | 1979-11-14 | $7700.00 | Window Closed / Lapsed |