Patent US3626027A successfully refreshed from Google Patents.
US3626027A
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US
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Process for producing a graft copolymer composition having a polyether as one component
Assignee: Daicel Corp
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Filing: 1968-08-05
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Granted: 1971-12-07
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Expires: 1988-08-05
Abstract
Abstract A process is disclosed and claimed for producing a graft copolymer composition, (e.g., polyether). The composition is prepared by adding and mixing more than an equivalent of an aliphatic polyether polymer with a polymer having an acid ester, acid anhydride, alcohol ester or acetal or alcohol group side chain, in the presence of a solvent solution. The mixture is then heated and a Lewis acid is added under agitation. The graft copolymer compositions are useful in molding applications.
Inventors
- 👤 Atsushi Tanaka
- 👤 Hideo Sawada
- 👤 Hirotaka Toba
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 22:35
CPC Classifications
C; C08; C08G; C08G81/00; C08G81/02; C08G81/024; C08G81/025
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
13 words
The process of claim 1 conducted in the presence of an organic solvent.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-12-06 | 1975-06-07 | 1975-12-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-12-06 | 1979-06-07 | 1979-12-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-12-06 | 1983-06-07 | 1983-12-07 | $7700.00 | Window Closed / Lapsed |