US3553180A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polymers of vinylpyridines and polyvinyl aromatic compounds
Assignee: Phillips Petroleum Co
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Filing: 1968-11-01
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Granted: 1971-01-05
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Expires: 1988-11-01
Abstract
Abstract VINYLPYRIDINES ARE POLYMERIZED IN THE PRESENCE OF A POLYVINYL AROMATIC COMPOUND. THE POLYMERIZATION IS CARRIED OUT IN A REACTION MEDIUM COMPRISING METHANOL AND WATER. THE RESULTING POLYMER IS PARTICULARLY USEFUL AS A CATALYST SUPPORT.
Inventors
- 👤 James W Cleary
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 04:54
CPC Classifications
B; B01; B01J; B01J31/00; B01J31/02; B01J31/06; C; C08; C08F; C08F20/00; C08F20/02; C08F20/08; B01J2231/00; B01J2231/30; B01J2231/32; B01J2231/321; B01J2531/00; B01J2531/80; B01J2531/84; B01J2531/845; B01J31/16; B01J31/18; B01J31/1805; B01J31/181; B01J31/20
Claims Analysis
Total Claims: 0
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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) | 1974-01-04 | 1974-07-06 | 1975-01-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-04 | 1978-07-06 | 1979-01-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-04 | 1982-07-06 | 1983-01-05 | $7700.00 | Window Closed / Lapsed |