Patent US2948329A successfully refreshed from Google Patents.
US2948329A
Expired / Lapsed
US
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Mica paper
Assignee: General Electric Co
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Filing: 1956-09-24
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Granted: 1960-08-09
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Expires: 1976-09-24
Abstract
No abstract record available.
Inventors
- 👤 Jr George L Gaines
- 👤 Arthur M Bueche
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 17:35
CPC Classifications
C; C04; C04B; C04B28/00; C04B28/24; D; D21; D21H; D21H13/00; D21H13/36; D21H13/38; D21H13/44; D21H17/00; D21H17/03; D21H17/05; D21H17/13; H; H01; H01B; H01B3/00; H01B3/02; H01B3/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
91 words
THE METHOD OF OBTAINING A MICA PAPER HAVING IMPROVED TENSILE STRENGTH AND MOISTURE RESISTANCE WHICH COMPRISES THE ESSENTIAL STEPS OF (1) IMPREGNATING THE MICA PAPER WITH AN ANHYDROUS ALKYL ORTHOSILICATE, (2) SUBJECTING THE ALKYL SILICATE IN THE MICA PAPER FOR THE FIRST TIME TO ACIDIC COMDITIONS GENERATED BY EXTERNALLY DERIVED MOISTURE TO EFFECT HYDROLYSIS OF THE ALKYL SILICATE, AND (3) HEATING THE MICA PAPER CONTAINING THE HYDROLYZED ALKYL SILICATE AT A TEMPERATURE SUFFICENT TO REMOVE THE VOLATILE HYDROLYSIS PRODUCTS AND TO LEAVE BEHIND A HYDROLYZED ALKYL SILICATE CONTAINING SILICON-BONDED ALKOXY GROUPS.
Claim 2
Independent Claim
91 words
THE METHOD OF OBTAINING A MICA PAPER HAVING IMPROVED TENSILE STRENGTH AND MOISTURE RESISTANCE WHICH COMPRISES THE ESSENTIAL STEPS OF (1) IMPREGNATING THE MICA PAPER WITH AN ANHYDROUS ALKYL ORTHOSILICATE, (2) SUBJECTING THE ALKYL SILICATE IN THE MICA PAPER FOR THE FIRST TIME TO ACIDIC COMDITIONS GENERATED BY EXTERNALLY DERIVED MOISTURE TO EFFECT HYDROLYSIS OF THE ALKYL SILICATE, AND (3) HEATING THE MICA PAPER CONTAINING THE HYDROLYZED ALKYL SILICATE AT A TEMPERATURE SUFFICENT TO REMOVE THE VOLATILE HYDROLYSIS PRODUCTS AND TO LEAVE BEHIND A HYDROLYZED ALKYL SILICATE CONTAINING SILICON-BONDED ALKOXY GROUPS.
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) | 1963-08-09 | 1964-02-08 | 1964-08-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-08-09 | 1968-02-08 | 1968-08-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-08-09 | 1972-02-08 | 1972-08-09 | $7700.00 | Window Closed / Lapsed |