US2804908A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making asbestos insulating material with improved electrical properties
Assignee: General Electric Co
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Filing: 1955-01-24
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Granted: 1957-09-03
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Expires: 1975-01-24
Abstract
No abstract record available.
Inventors
- 👤 Laurence W Spooner
- 👤 Jr George A Joyner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 14:47
CPC Classifications
H; H01; H01B; H01B3/00; H01B3/02; H01B3/06; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31652
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
64 words
THE METHOD OF MAKING A HARD, DENSE ELECTRICAL INSULATING PRODUCT HAVING LOW POWER FACTOR, LOW DIELECTRIC CONSTANT AND HIGH DIELECTRIC STRENGTH, WHICH COMPRISES IMPREGNATING ASBESTOS SHEET MATERIAL WITHIN ALUMINUM PHOSPHATE SUPERIMPOSING A PLURALITY OF LAYERS OF THE THUS TREATED ASBESTOS SHEET MATERIAL TO FORM LAMINATE STRUCTURE-AND HEATING THE THUS FORMED LAMINATED STRUCTURE FOR AT LEAST ONE HOUR AT A TEMPERATURE OF AT LEAST 600*C.
Claim 2
Independent Claim
64 words
THE METHOD OF MAKING A HARD, DENSE ELECTRICAL INSULATING PRODUCT HAVING LOW POWER FACTOR, LOW DIELECTRIC CONSTANT AND HIGH DIELECTRIC STRENGTH, WHICH COMPRISES IMPREGNATING ASBESTOS SHEET MATERIAL WITHIN ALUMINUM PHOSPHATE SUPERIMPOSING A PLURALITY OF LAYERS OF THE THUS TREATED ASBESTOS SHEET MATERIAL TO FORM LAMINATE STRUCTURE-AND HEATING THE THUS FORMED LAMINATED STRUCTURE FOR AT LEAST ONE HOUR AT A TEMPERATURE OF AT LEAST 600*C.
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) | 1960-09-02 | 1961-03-04 | 1961-09-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-09-02 | 1965-03-04 | 1965-09-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-09-02 | 1969-03-04 | 1969-09-03 | $7700.00 | Window Closed / Lapsed |