US3825516A
Expired / Lapsed
US
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Glass fiber-reinforced,terephthalic acid-containing polyamide molding compounds
Assignee: Dynamit Nobel AG
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Filing: 1972-11-29
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Granted: 1974-07-23
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Expires: 1992-11-29
Abstract
Abstract A METHOD FOR INCORPORATING GLASS PARTICLES INTO AN AMORPHOUS POLYAMIDE CONTAINING TEREPHTHALIC ACID RADICALS AND A POLYMER SELECTED FROM THE GROUP CONSISTING OF 2,2,4-TRIMETHYLHEXAMETHYLENE DIAMINE AND 2,4,4-TRIMETHYLHEXAMETHYLENE DIAMINE WHICH PROCESS COMPRISES INTRODUCING SAID POLYAMIDE AND SAID GLASS PARTICLES INTO A ZONE AND KNEADING THEM TOGETHER, PREFERABLY BY EMPLOYING A SCREW EXTRUDER SUCH AS A DOUBLE SCREW EXTRUDER UNTIL THE GLASS PARTICLES ARE INTIMATELY INCORPORATED WITHIN AND DISTRIBUTED THROUGHOUT SAID POLYAMIDE.
Inventors
- 👤 J Schneider
- 👤 W Pungs
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 21:07
CPC Classifications
B; B29; B29B; B29B9/00; B29B9/12; B29B9/14; B29B9/02; B29B9/06; C; C08; C08K; C08K7/00; C08K7/02; C08K7/04; C08K7/14
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) | 1977-07-22 | 1978-01-21 | 1978-07-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-07-22 | 1982-01-21 | 1982-07-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-07-22 | 1986-01-21 | 1986-07-23 | $7700.00 | Window Closed / Lapsed |