US3658751A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Friction particle for brake lining
Assignee: Hooker Chemical Corp
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Filing: 1969-10-30
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Granted: 1972-04-25
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Expires: 1989-10-30
Abstract
Abstract A FRICTION PARTICLE, USEFUL IN APPLICATIONS WHERE CASHEW NUT SHELL OIL FROICTION PARTICLES HAVE BEEN U SED, MAY BE PREPARED BY THE REACTION AT A TEMPERATURE FROM ABOUT 225 TO ABOUT 400 DEGREES FAHRENHEIT OF A NON-OXYALKYLATED RESOLE WITH RESIN SELECTED FROM THE GROUP CONSISTING OF AN OXYALKYLATED RESOLE, AN ALKYLATED RESOLE, AN ALKYLATED NOVOLAC, AN OXYALKYLATED NOVOLAC, AND MIXTURES THEREOF UNTIL IT IS INSOLUBLE, INFUSIBLE, AND DOES NOT SOFTEN SLIGHTLY UNDER MECHANICAL FORCE AT TEMPERATURES BELOW ABOUT 400 DEGREES FAHRENHEIT, AND HAS SUBSTANTIALLY NO COHESIVE OR BONDING STRENGTH.
Inventors
- 👤 Frank S Grazen
- 👤 Melvin L Buike
- 👤 Frank M Bryzinsky
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 14:21
CPC Classifications
C; C08; C08J; C08J3/00; C08J3/12; C08L; C08L61/00; C08L61/04; C08L61/06; C08L61/14; C08J2361/00
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) | 1975-04-25 | 1975-10-25 | 1976-04-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-04-25 | 1979-10-25 | 1980-04-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-04-25 | 1983-10-25 | 1984-04-25 | $7700.00 | Window Closed / Lapsed |