US3767612A
Expired / Lapsed
US
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Friction element composition
Assignee: Hooker Chemical Corp
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Filing: 1971-10-12
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Granted: 1973-10-23
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Expires: 1991-10-12
Abstract
Abstract A FRICTION BINDER FOR A FRICTION ELEMENT COMPOSITION, ESPECIALLY USEFUL WHERE CASHEW NUT SHELL OIL AND/OR VEGETABLE OILS HAVE BEEN USED IN A PHENOLIC RESIN COMPOSITION, MAY BE PREPARED BY BLENDING A NON-OXYALKYLATED RESOLE WITH RESIN SELECTED FROM THE GROUP CONSISTING OF AN OXYALKYLATED RESOLE, ALKYALTED RESOLE, AN OXYALKYLATED NOVOLAC, AN ALKYLATED NOVOLAC, AND MIXTURES THEREOF. THE FRICTION ELEMENT COMPOSITION IS PREPARED BY ADDING TO THIS BINDER ASBESTOS FIBER AND FRICTION IMPARTING MATERIALS, AND CURING THE RESULTANT MATERIAL.
Inventors
- 👤 F Grazen
- 👤 M Buike
- 👤 F Bryzinsky
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 23:33
CPC Classifications
F; F16; F16D; F16D69/00; F16D69/02; F16D69/021; C; C08; C08G; C08G8/00; C08G8/28; C08G8/36; C08L; C08L61/00; C08L61/04; C08L61/06
Claims Analysis
Total Claims: 0
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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) | 1976-10-22 | 1977-04-23 | 1977-10-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-22 | 1981-04-23 | 1981-10-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-22 | 1985-04-23 | 1985-10-23 | $7700.00 | Window Closed / Lapsed |