US3792148A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the preparation of shaped articles from polyamides
Assignee: Hoechst AG
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Filing: 1972-04-14
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Granted: 1974-02-12
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Expires: 1992-04-14
Abstract
Abstract THERE IS DISCLOSED AND CLAIMED A PROCESS FOR THE PRODUCTION OF SHAPED ARTICLES FROM POLYAMIDES WHICH EXHIBIT MELTING RANGES NEAR TO OR ABOVE DECOMPOSTION TEMPERATURES OR POOR OR NO SOLUBILITY AT ALL IN SOLVENTS OR WHICH XHIBIT BOTH OF THESE PROPERTIES AT THE SAME TIME, THE PROCESS WHICH COMPRISES MOULDING POLYAMIDES CARRYING SUBSTITUENTS OF THE AMIDE NITROGEN AND THUS HAVING REDUCED MELTING RANGES AND/OR IMPROVED SOLUBILITY IN SOLVENTS, AND SEPARATING (SPLITTING-OFF) SAID SUBSTITUENTS PARTIALLY PR TOTALLY DURING AND/OR AFTER MOULDING.
Inventors
- 👤 E Reske
- 👤 L Brinkmann
- 👤 H Cherdron
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 14:06
CPC Classifications
C; C08; C08G; C08G69/00; C08G69/48
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) | 1977-02-11 | 1977-08-13 | 1978-02-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-02-11 | 1981-08-13 | 1982-02-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-02-11 | 1985-08-13 | 1986-02-12 | $7700.00 | Window Closed / Lapsed |