US3639331A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Glass fiber reinforced resins containing dispersion aid
Assignee: WILSON-FIBERFIL HOLDINGS Inc A DE CORP
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Filing: 1968-03-25
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Granted: 1972-02-01
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Expires: 1988-03-25
Abstract
Abstract NOVEL GLASS FIBER REINFORCED THERMOPLASTICS HAVING BETTER DISPERSION OF THE GLASS FIBERS THEREIN AND PROCESS CONSISTING OF INCORPORATION OF AN ADDITIVE SUCH AS A LUBRICANT, PLASTICIZER OR LOW MOLECULAR WEIGHT RESIN TO REDUCE THE MELT VISCOSITY OF THE RESIN SURROUNDING THE GLASS FIBER RELATIVE TO VISCOSITY OF THE UNREINFORCED RESIN AT THE MELT TEMPERATURE.
Inventors
- 👤 Kiyoshi Hattori
- 👤 Elby Leon Richardson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 05:16
CPC Classifications
C; C08; C08J; C08J5/00; C08J5/04; C08J5/10; 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) | 1975-01-31 | 1975-08-02 | 1976-02-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-01-31 | 1979-08-02 | 1980-02-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-01-31 | 1983-08-02 | 1984-02-01 | $7700.00 | Window Closed / Lapsed |