US3698920A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Porous ceramic insulating material and method of making employing wax
Assignee: General Electric Co
•
Filing: 1967-08-30
•
Granted: 1972-10-17
•
Expires: 1987-08-30
Abstract
Abstract POROUS INSULATING MATERIAL SUITABLE FOR FORMING ARCHING GAP PLATES OF LIGHTNING ARRESTERS IS MADE FROM A MIXTURE OF ALUMINUM OXIDE GRAINS OF SELECTED PARTICLE SIZE TO PROVIDE INCREASED POROSITY, MOLTEN WAX AND POWDERED GLASS, THE WARM MIXTURE BEING COOLED AT A CONTROLLED RATE TO PRODUCE A HOMOGENEOUS MASS OF FREE-FLOWING PARTICLES WHICH ARE THEREAFTER PRESSED INTO DESIRED SHAPE AND FIRED AT ELEVATED TEMPERATURE.
Inventors
- 👤 John J Pitha
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 11:10
CPC Classifications
C; C04; C04B; C04B33/00; C04B33/02; C04B33/025; C04B35/00; C04B35/01; C04B35/10; C04B38/00; C04B38/06; C04B38/063; C04B38/0635; C04B38/0645; C04B38/068; H; H01; H01B; H01B3/00; H01B3/02; H01B3/08; H01B3/085
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-10-17 | 1976-04-17 | 1976-10-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-10-17 | 1980-04-17 | 1980-10-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-10-17 | 1984-04-17 | 1984-10-17 | $7700.00 | Window Closed / Lapsed |