US3787352A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of preparing glass fiber-elastomer compositions
Assignee: Owens Corning
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Filing: 1971-09-02
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Granted: 1974-01-22
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Expires: 1991-09-02
Abstract
Abstract THIS INVENTION IS ADDRESSED TO A METHOD FOR THE PREPARATION OF MOLDING COMPOUNDS FORMED OF AN ELASTOMERIC MATERIAL REINFORCED WITH GLASS FIBERS WHEREIN BUNDLES OF GLASS FIBERS WHICH HAVE BEEN IMPREGNATED WITH AN ELASTOMER COMPONENT ARE CHOPPED TO SHORTER LENGTHS AND THEN COMBINED WITH ELASTOMERIC MATERIAL WHILE WORKING THE ELASTOMERIC MATERIAL TO SEPARATE THE FIBERS FORMING THE BUNDLE EACH FROM THE OTHER AND TO UNIFORMLY DISTRIBUTE THE FIBERS THROUGHOUT THE ELASTOMERIC MATERIAL. THE MOLDED COMPOSITIONS OF THE PRESENT INVENTION ARE CHARACTERIZED BY SIGNIFICANTLY IMPROVED HYSTERESIS CHARACTERISTICS WHEN SUBJECTED TO DEFORMATION UNDER STRESS.
Inventors
- 👤 A Marzocchi
- 👤 J Martineau
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 07:18
CPC Classifications
C; C08; C08J; C08J5/00; C08J5/04; C08J5/06; C08J5/08; C08J2321/00
Claims Analysis
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References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-01-21 | 1977-07-23 | 1978-01-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-01-21 | 1981-07-23 | 1982-01-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-01-21 | 1985-07-23 | 1986-01-22 | $7700.00 | Window Closed / Lapsed |