US3135715A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rubber electric insulation
Assignee: Ericsson Inc
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Filing: 1960-03-17
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Granted: 1964-06-02
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Expires: 1980-03-17
Abstract
No abstract record available.
Inventors
- 👤 Robert F Hinderer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 16:01
CPC Classifications
H; H01; H01B; H01B7/00; H01B7/17; H01B7/28; H01B3/00; H01B3/18; H01B3/28
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
149 words
THE METHOD OF MAKING POWER CABLE HAVING RUBBER INSULATION IN WHICH FILLER PARTICLES ARE FINELY DISPERSED AND WHICH DISPLAYS UNIFORMLY HIGH DIELECTRIC STRENGTH, WHICH COMPRISES INTIMATELY BLENDING AND MILLING TOGETHER IN PULVERULENT SOLID FORM A MIXTURE OF FILLERS COMPRISING FROM 1% TO 10% BY WEIGHT OF CARBON BLACK AND FROM 60% TO 99% BY WEIGHT OF WHITING IN SOLID PULVERULENT FORM, DRYING SAID MIXTURE BY SUBJECTING IT TO A SUBATMOSPHERIC TEMPERATURE AND HEATING IT TO A TEMPERATURE ABOVE ABOUT 200*F. IN THE COURSE OF SUCH BLENDING AND MILLING, THEREAFTER PREPARING A RUBBER INSULATING COMPOSITION BY INTIMATELY MIXING THE BLENDED AND DRIED PULVERULENT FILLERS WITH BUTYL RUBBER STOCK AND WITH PROCESSING AND VLUCANIZING AGENTS, WHEREBY A COMPOSITION SUBSTANTIALLY FREE OF FILLER AGGLOMERATES OR PARTICLES EXCEEDING 2 MILS IN MAXIMUM DIMENSION IS FORMED, APPLYING SAID INSULATING COMPOSITION AS AN INSULATING LAYER TO A CONDUCTOR, AND CURING THE COMPOSITION ON THE CONDUCTOR.
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) | 1967-06-02 | 1967-12-02 | 1968-06-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-06-02 | 1971-12-02 | 1972-06-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-06-02 | 1975-12-02 | 1976-06-02 | $7700.00 | Window Closed / Lapsed |