US2524601A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Alumina insulating material anb
Assignee: —
•
Filing: —
•
Granted: 1950-10-03
•
Expires: 1967-10-03
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:58
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/01; C04B35/16; C04B35/18; C04B35/195; C04B35/66; C04B2235/00; C04B2235/02; C04B2235/30; C04B2235/32; C04B2235/3205; C04B2235/3206; C04B2235/3208; C04B2235/3217; C04B2235/34; C04B2235/3409; C04B2235/3418; C04B2235/50; C04B2235/54; C04B2235/5418; C04B2235/5436; C04B2235/70; C04B2235/80; C04B2235/96; C04B2235/9607; C04B2235/9615
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
61 words
THE METHOD OF MAKING AN ELECTRIC INSULATOR WHICH CONSISTS IN FIRING TO VITRIFICATION A CERAMIC BODY CONSISTING OF ABOUT 84% ALUMINA CRYSTALS, ABOUT 10% ANHYDROUS ALUMINUM SILICATE, AND ABOUT 6% MINERALIZERS CONSISTING ESSENTIALLY OF ALKALINE EARTH METAL OXIDE, AND CONTINUING THE FIRING UNTIL THERE ARE NO MULLITE CRYSTALS DETECTABLE IN THE FIRED BODY BUT NOT SUFFICIENT TO MELT THE ALUMINA CRYSTALS.
Claim 2
Independent Claim
61 words
THE METHOD OF MAKING AN ELECTRIC INSULATOR WHICH CONSISTS IN FIRING TO VITRIFICATION A CERAMIC BODY CONSISTING OF ABOUT 84% ALUMINA CRYSTALS, ABOUT 10% ANHYDROUS ALUMINUM SILICATE, AND ABOUT 6% MINERALIZERS CONSISTING ESSENTIALLY OF ALKALINE EARTH METAL OXIDE, AND CONTINUING THE FIRING UNTIL THERE ARE NO MULLITE CRYSTALS DETECTABLE IN THE FIRED BODY BUT NOT SUFFICIENT TO MELT THE ALUMINA CRYSTALS.
References Cited (Backward Citations)
US2272618A
Cited
US2195950A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-10-02 | 1954-04-03 | 1954-10-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-10-02 | 1958-04-03 | 1958-10-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-10-02 | 1962-04-03 | 1962-10-03 | $7700.00 | Window Closed / Lapsed |