Patent US3578636A successfully refreshed from Google Patents.
US3578636A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for manufacturing alternating copolymers of conjugated vinyl compounds and olefinic unsaturated compounds
Assignee: Sumitomo Chemical Co Ltd
•
Filing: 1969-11-18
•
Granted: 1971-05-11
•
Expires: 1989-11-18
Abstract
Abstract VINYL COMPOUNDS HAVING A CARBONYL OR NITRILE GROUP AT THE CONJUGATED POSITION FORM A COMPLEX WITH AN ORGANOALUMINUM HALIDE. WHEN THESE COMPONENTS ARE SUBJECTED TO REACTION IN THE PRESENCE OF A TERMINALLY UNSATURATED OLEFINIC HYDROCARBON AND OXYGEN OR AN ORGANIC PEROXIDE, AN ALTERNATING COPOLYMER OF THE CONJUGATED VINYL COMPOUND AND THE OLEFINIC MONOMER IS OBTAINED. THE OXYGEN OR ORGANIC PEROXIDE PROMOTES THE DESIRED COPOLYMERIZATION REACTION OF A MIXTURE OF THESE MONOMERS TO PRODUCE AN ALTERNATING COPOLYMER.
Inventors
- 👤 Kohei Nakaguchi
- 👤 Shohachi Kawasumi
- 👤 Masaaki Hirooka
- 👤 Hiroshi Yabuuchi
- 👤 Hiroyoshi Takao
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 07:52
CPC Classifications
C; C08; C08F; C08F4/00; C08F4/06; C08F4/12; C08F4/14; C08F10/00; C08F210/00; C08F210/04; C08F210/06; C08F210/08; C08F210/10
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1974-05-10 | 1974-11-09 | 1975-05-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-05-10 | 1978-11-09 | 1979-05-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-05-10 | 1982-11-09 | 1983-05-11 | $7700.00 | Window Closed / Lapsed |