US3761450A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Salts of polycarboxylic acids as nucleating agents in polyesters
Assignee: Hoechst AG
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Filing: 1972-07-03
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Granted: 1973-09-25
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Expires: 1992-07-03
Abstract
Abstract MOLDING COMPOSITIONS BASED ON LINEAR SATURATED POLYESTERS AND THE LITHIUM AND/OR SODIUM SALTS OF POLYCARBOXYLIC ACIDS, WHICH MOLDING COMPOSITIONS MAY BE WORKED UP IN THE THERMOPLASTIC STATE AND FROM WHICH MOLDED ARTICLES HAVING A HIGH DIMENSIONAL STABILITY CAN BE MADE. IN THE MANUFACTURE OF MOLDED ARTICLES, ALREADY SMALL AMOUNTS OF THE SAID SALTS BRING ABOUT A HIGH CRYSTALLINITY IN THE HEATED MOLD AFTER A SHORT TIME.
Inventors
- 👤 W Herwig
- 👤 G Freund
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 11:06
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/04; C08K5/09; C08K5/098
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) | 1976-09-24 | 1977-03-26 | 1977-09-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-24 | 1981-03-26 | 1981-09-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-24 | 1985-03-26 | 1985-09-25 | $7700.00 | Window Closed / Lapsed |