US3553157A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyester compositions and shaping process
Assignee: Imperial Chemical Industries Ltd
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Filing: 1968-05-22
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Granted: 1971-01-05
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Expires: 1988-05-22
Abstract
Abstract PREPARING THICK-WALLED SHAPED ARTICLES OF IMPROVED PHYSICAL PROPERTIES FROM POLY(ETHYLENE TEREPHTHALATE), ESPECIALLY BY INJECTION-MOULDING USING A HOT MOULD, BY MELT-SHAPPING THE POLYMER IN ADMIXTURE WITH A COMPOUND CAPABLE OF REACTING WITH AT LEAST TWO GROUPS SELECTED FROM -OH AND-COOH; ESPECIALLY A POLISOCYANATE OR UREITIDONE OLIGOMER THEREOF. THE COMPOSITION TO BE MELT SHAPED MAY ALSO CONTAIN GLASS FIBERS AND A CRYSTALLISATION PROMOTER FOR THE POLYMER.
Inventors
- 👤 Albert Jan Dijkstra
- 👤 James Angus Wilson Reid
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:31
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/04; C08K5/15; C08K5/151; C08K5/1535; C08K5/1539; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/40; C08G18/42; C08G18/4205; C08G18/4208; C08G18/4211; C08G18/4213; C08G63/00; C08G63/02; C08G63/12; C08G63/16; C08G63/20; C08L; C08L67/00; C08L67/02
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 |