US3736222A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ceramic articles and method of sealing ceramics
Assignee: General Electric Co
•
Filing: 1971-04-28
•
Granted: 1973-05-29
•
Expires: 1991-04-28
Abstract
Abstract A METHOD OF FORMING A SEAL BETWEEN HIGH-DENSITY ALUMINA BODIES IS PROVIDED. THE METHOD INVOLVES PLACING AN AL2O3-GA2O3 MIXTURE BETWEEN THE BODIES TO BE SEALED AND HEATING THE MIXTURE TO A TEMPERATURE ABOVE THE MELTING POINT OF GA2O3 AND BELOW THE DEFORMATION TEMPERATURE OF THE BODIES SUCH THAT A SOLID SOLUTION OF AL2O3-GA2O3 FORMS AS A SEAL BETWEEN THE ALUMINA BODIES. CERAMIC ARTICLES HAVING A GAS TIGHT SEAL ARE MADE BY THE METHOD.
Inventors
- 👤 R Arendt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 20:08
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/622; C04B35/626; C04B35/63; C04B35/632; C04B35/634; C04B35/63404; C04B35/63416; C04B37/00; C04B37/003; C04B37/005; C04B2235/00; C04B2235/65; C04B2235/656; C04B2235/6567; C04B2235/70; C04B2235/74; C04B2235/76; C04B2237/00; C04B2237/02; C04B2237/04; C04B2237/06; C04B2237/064; C04B2237/09; C04B2237/30; C04B2237/32; C04B2237/34; C04B2237/343; C04B2237/50; C04B2237/76; C04B2237/765
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) | 1976-05-28 | 1976-11-27 | 1977-05-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-05-28 | 1980-11-27 | 1981-05-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-05-28 | 1984-11-27 | 1985-05-29 | $7700.00 | Window Closed / Lapsed |