US3577494A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for the preparation of extrudable synthetic resinous materials
Assignee: Dow Chemical Co
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Filing: 1969-09-05
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Granted: 1971-05-04
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Expires: 1989-09-05
Abstract
Abstract IMPROVED FEED OF GRANULAR SYNTHETIC RESINOUS MATERIAL IN SCREW EXTRUDERS IS OBTAINED AND FIBER BREAKAGE IS SIGNIFICANTLY REDUCED WHEN CHOPPED GLASS FIBER AND EXTRUDABLE RESIN MIXED IN AN EXTRUDER HAVING AN INCREASING WORKING VOLUME SCREW. THE PRODUCT HAS SIGNIFICANTLY INPROVED IMPACT STRENTH.
Inventors
- 👤 Douglas S Chisholm
- 👤 James K Rieke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 21:45
CPC Classifications
B; B29; B29C; B29C45/00; B29C45/0005; B29B; B29B7/00; B29B7/30; B29B7/58; B29B7/60; B29B7/80; B29B7/82; B29B7/826; B29B7/88; B29B7/90; B29B9/00; B29B9/02; B29B9/06; B29B9/12; B29B9/14; B29C45/17; B29C45/46; B29C45/47; B29C48/00; B29C48/25; B29C48/285; B29C48/288; B29C48/2886; B29C48/29; B29C48/03; B29C48/36; B29C48/50; B29C48/505; B29C48/59; B29C48/595; B29K; B29K2105/00; 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) | 1974-05-03 | 1974-11-02 | 1975-05-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-05-03 | 1978-11-02 | 1979-05-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-05-03 | 1982-11-02 | 1983-05-04 | $7700.00 | Window Closed / Lapsed |