US3249658A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Processes for curing rubber compounds
Assignee: Individual
•
Filing: 1964-10-05
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Granted: 1966-05-03
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Expires: 1984-10-05
Abstract
No abstract record available.
Inventors
- 👤 William E Hodges
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 04:18
CPC Classifications
C; C08; C08J; C08J3/00; C08J3/24; C08J3/247; B; B29; B29C; B29C35/00; B29C35/02; B29C35/0272; B29C35/08; C08L; C08L21/00; B29C35/0805; B29C2035/0811; B29K; B29K2021/00; B29L; B29L2030/00; C08J2321/00; Y; Y10; Y10S; Y10S264/00; Y10S264/51
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
160 words
A PROCESS FOR CURING A VULCANIZABLE RUBBER COMPOUND WHICH COMPRISES INCORPORATING IN AND DISTRIBUTING THROUGHOUT SAID VULCANIZABLE RUBBER COMPOUND FINELY DIVIDED PARTICLES OF AN ELECTRICALLY CONDUCTIVE FERROMAGNETIC MATERIAL HAVING A CURIE POINT SUBSTANTIALLY GREATER THAN THE CURING TEMPERATURE OF SAID VULCANIZABLE RUBBER COMPOUND AND AT LEAST AS GREAT AS THE CURIE POINT OF MAGNETITE AND A TEMPERATURE-TIME CURVE HAVING THE SLOPE OF ITS INITIAL PORTION AT LEAST AS GREAT AS THE SLOPE OF THE INITIAL PORTION OF THE TEMPERATURE-TIME CURVE OF MAGNETITE OF THE SAME PARTICLE SIZE (BOTH CURVES BEING DERIVED UNDER THE SAME CONDITIONS), SUBJECTING SAID VULCANIZABLE RUBBER COMPOUND HAVING SAID PARTILCES DISTRIBUTED THERIN TO A HIGH FREQUENCY ELECTROMAGNETIC FIELD OF A STRENGTH SURFICIENTLY HIGH TO HEAT SAID PARTICLES TO TEMPERATURE SUFFICIENT TO ELEVATE SAID VULCANIZABLE RUBBER COMPOUND TO A TEMPERATURE IN EXCESS OF THE CURING TEMPERATURE OF SAID VULCANIZABLE RUBBER COMPOUND, AND MAINTAINING SAID VULCANIZABLE RUBBER COMPOUND IN SAID ELECTROMAGNETIC FIELD UNTIL SAID VULCANZIABLE RUBBER COMPOUND IS CURED.
Claim 2
Dependent Claim
160 words
A PROCESS FOR CURING A VULCANIZABLE RUBBER COMPOUND WHICH COMPRISES INCORPORATING IN AND DISTRIBUTING THROUGHOUT SAID VULCANIZABLE RUBBER COMPOUND FINELY DIVIDED PARTICLES OF AN ELECTRICALLY CONDUCTIVE FERROMAGNETIC MATERIAL HAVING A CURIE POINT SUBSTANTIALLY GREATER THAN THE CURING TEMPERATURE OF SAID VULCANIZABLE RUBBER COMPOUND AND AT LEAST AS GREAT AS THE CURIE POINT OF MAGNETITE AND A TEMPERATURE-TIME CURVE HAVING THE SLOPE OF ITS INITIAL PORTION AT LEAST AS GREAT AS THE SLOPE OF THE INITIAL PORTION OF THE TEMPERATURE-TIME CURVE OF MAGNETITE OF THE SAME PARTICLE SIZE (BOTH CURVES BEING DERIVED UNDER THE SAME CONDITIONS), SUBJECTING SAID VULCANIZABLE RUBBER COMPOUND HAVING SAID PARTILCES DISTRIBUTED THERIN TO A HIGH FREQUENCY ELECTROMAGNETIC FIELD OF A STRENGTH SURFICIENTLY HIGH TO HEAT SAID PARTICLES TO TEMPERATURE SUFFICIENT TO ELEVATE SAID VULCANIZABLE RUBBER COMPOUND TO A TEMPERATURE IN EXCESS OF THE CURING TEMPERATURE OF SAID VULCANIZABLE RUBBER COMPOUND, AND MAINTAINING SAID VULCANIZABLE RUBBER COMPOUND IN SAID ELECTROMAGNETIC FIELD UNTIL SAID VULCANZIABLE RUBBER COMPOUND IS CURED.
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) | 1969-05-02 | 1969-11-01 | 1970-05-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-05-02 | 1973-11-01 | 1974-05-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-05-02 | 1977-11-01 | 1978-05-03 | $7700.00 | Window Closed / Lapsed |