Patent US3636181A successfully refreshed from Google Patents.
US3636181A
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Difunctional monomers from vinyl substituted benzyl chlorides and chloromethyl butadiene and polymers prepared therefrom
Assignee: Dow Chemical Co
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Filing: 1969-04-28
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Granted: 1972-01-18
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Expires: 1989-04-28
Abstract
Abstract DIFUNCTIONAL MONOMERS OF THE TYPE 2-(VINYLPHENETHYL)1,3-BUTADIENE ARE PREPARED BY MAKING THE GRIGNARD OF THE VINYL BENZYL CHLORIDE COMPOUNDS FOLLOWED BY INVERSE GRIGNARD COUPLING WITH 2-CHLOROMETHYL 1,3-BUTADIENE. THE MONONOMERS ARE USEFUL IN MAKING GRAFT, BRANCHED OR CROSSLINKED POLYMERS AND COPOLYMERS.
Inventors
- 👤 Giffin D Jones
- 👤 Mary R Thomas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 16:21
CPC Classifications
C; C07; C07C; C07C15/00; C07C15/40; C07C15/42; C07C15/44; Y; Y10; Y10S; Y10S585/00; Y10S585/929; Y10S585/93; Y10S585/931
Claims Analysis
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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) | 1975-01-17 | 1975-07-19 | 1976-01-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-01-17 | 1979-07-19 | 1980-01-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-01-17 | 1983-07-19 | 1984-01-18 | $7700.00 | Window Closed / Lapsed |