US3661837A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Continuous incorporation of glass fibers into polyamides
Assignee: BASF SE
•
Filing: 1970-05-27
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Granted: 1972-05-09
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Expires: 1990-05-27
Abstract
Abstract CONTINUOUS INCORPORATION OF GLASS FIBERS INTO SYNTHETIC LINEAR POLYAMIDES HAVING PERIODICALLY RECURRING AMIDE GROUPS IN THE MAIN CHAIN IN A SCREW EXTRUDER, GLASS FIBERS AND UNMELTED PLASTICS GRANULES BEING SUPPLIED SIMULTANEOUSLY OR SUCCESSIVELY TO THE POLYAMIDE MELT AND THE UNMELTED GRANULES SERVING AS COMMINUTING AIDS.
Inventors
- 👤 Anton Cadus
- 👤 Hermann Uhr
- 👤 Reinhold Weber
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 19:22
CPC Classifications
B; B29; B29C; B29C48/00; B29C48/25; B29C48/285; B29C48/288; B29C48/2886; B29C48/03; B29C48/29; B29K; B29K2105/00; B29K2105/0005; B29K2105/06; B29K2105/12
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) | 1975-05-09 | 1975-11-08 | 1976-05-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-09 | 1979-11-08 | 1980-05-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-09 | 1983-11-08 | 1984-05-09 | $7700.00 | Window Closed / Lapsed |