Patent US3660554A successfully refreshed from Google Patents.
US3660554A
Expired / Lapsed
US
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Process for the preparation of shaped materials of amidovinyl compoundgrafted aromatic polyesters
Assignee: Kurashiki Rayon Co Ltd
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Filing: 1969-07-15
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Granted: 1972-05-02
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Expires: 1989-07-15
Abstract
Abstract A PROCESS FOR THE PREPARATION OF AN AMIDOVINYL COMPOUND-GRAFTED SHAPED MATERIAL OF AROMATIC POLYESTERS, WHICH COMPRISES HEATING A SHAPED MATERIAL OF AROMATIC POLYESTR AT A TEMPERATURE OF 60-150*C., WHILE KEEPING IT IN CONTACT WITH A SOLVENT CONTAINING AT LEAST ONE AMIDOVINYL COMPOUND, THE SOLVENT BEING SUCH THAT THE SOLUBILITY OF THE AMIDOVINYL COMPOUND THEREIN IS 0.1-50 G. PER 100 CC. AT 45*C., AND THE DEGREE OF SWELLING OF THE SHAPED MATERIAL WITH THE SOLVENT IS 0-5-20% AT 60*C.
Inventors
- 👤 Takayuki Okamura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 15:59
CPC Classifications
C; C08; C08J; C08J7/00; C08J7/12; C08J7/16; D; D06; D06M; D06M14/00; D06M14/08; D06M14/12; D06M14/14; C08J2367/00; C08J2367/02; Y; Y10; Y10S; Y10S8/00; Y10S8/18
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) | 1975-05-02 | 1975-11-01 | 1976-05-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-02 | 1979-11-01 | 1980-05-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-02 | 1983-11-01 | 1984-05-02 | $7700.00 | Window Closed / Lapsed |