US2539631A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of modifying drying oils and friction material containing modified drying oil
Assignee: Raybestos Manhattan Inc
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Filing: 1948-02-11
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Granted: 1951-01-30
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Expires: 1968-02-11
Abstract
No abstract record available.
Inventors
- 👤 Joseph N Kuzmick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 05:05
CPC Classifications
C; C08; C08L; C08L91/00; C08L91/005
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
103 words
A FRICTION MATERIAL MOLDING COMPOSITION COMPRISING A MIXTURE OF SHORT FIBROUS ASBESTOS, DRYING OIL BINDER AND BINDER SOLVENT, SAID DRYING OIL BINDER RESULTING FROM SUBJECTING LINSEED OIL TO TREATMENT WITH AN OXYGEN CONTAINING GAS AT A TEMPERATURE OF ABOUT 70* F. TO 200* F. UNTIL 16% TO 20% OXYGEN HAS BEEN INCORPORATED AND TERMINATING SAID TREATMENT BEFORE THE OIL HAS LOST ITS FLUIDITY AT NORMAL ROOM TEMPERATURE, AND POLYMERIZING THE OIL BY HEATING IT AT A TEMPERATURE BETWEEN APPROXIMATELY 250* F. AND 350* F. UNTIL THE OIL BECOMES A GEL AT NORMAL ROOM TEMPERATURE MELTING ABOVE 200* F. AND REMAINS SOLUBLE PETROLEUM SOLVENTS.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-01-29 | 1954-07-31 | 1955-01-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-01-29 | 1958-07-31 | 1959-01-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-01-29 | 1962-07-31 | 1963-01-30 | $7700.00 | Window Closed / Lapsed |