US3836596A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polymerization of dialkyl vinylidene compounds to oils
Assignee: Sun Research and Development Co
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Filing: 1972-05-01
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Granted: 1974-09-17
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Expires: 1992-05-01
Abstract
Abstract POLYMERIZATION OF OLEFINE OF THE FORMULA CH2=C(-R)-R'' WHEREIN-R IS SELECTED FROM THE CLASS CONSISTING OF-CH3 AND-C2H5 AND -R'' IS AN ALKYL GROUP OF FROM 1 TO 10 CARBON ATOMS, TO FORM OILS HAVING A RELATIVELY HIGH VISCOSITY INDEX AS COMPARED TO OTHER COMPARABLE OILS USING STANIC CHLORIDES AS THE CATALYST AND A SOLVENT SELECTED FROM THE CLASS CONSISTING OF NITROPROPANE, AT FROM -30 TURES THEREOF TOGETHER AND EWITH NITROPROPANE AT FROM -30 TO 100* C. AND IS PREFERABLY FROM -30* TO 50* C. THE STANNIC CHLORIDE IS PRESENT IN FROM 0.1 TO 5 AND PREFERABLY 0.3 TO 3 VOLUME PERCENT AS BASED ON THE SOLVENT PRESENT.
Inventors
- 👤 G Driscoll
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 23:13
CPC Classifications
C; C10; C10M; C10M3/00; C10M171/00; C10M171/002; H; H01; H01B; H01B3/00; H01B3/18; H01B3/20; H01B3/22; C07; C07C; C07C2527/00; C07C2527/06; C07C2527/135; C07C2531/00; C07C2531/02; C07C2531/12; C07C2531/14
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-09-16 | 1978-03-18 | 1978-09-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-09-16 | 1982-03-18 | 1982-09-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-09-16 | 1986-03-18 | 1986-09-17 | $7700.00 | Window Closed / Lapsed |