US3239322A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for sealing vacuum-tight spinel bodies
Assignee: General Electric Co
•
Filing: 1961-05-24
•
Granted: 1966-03-08
•
Expires: 1981-05-24
Abstract
No abstract record available.
Inventors
- 👤 Ralph E Carter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:11
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/01; C04B35/44; C04B35/12; C04B35/42; C04B37/00; C04B37/003; C04B37/005; C23; C23C; C23C16/00; C23C16/22; C30; C30B; C30B29/00; C30B29/10; C30B29/16; C30B29/22; C30B29/26; C04B2235/00; C04B2235/65; C04B2235/656; C04B2235/6567; C04B2235/658; C04B2235/6582; C04B2237/00; C04B2237/02; C04B2237/04; C04B2237/06; C04B2237/30; C04B2237/32; C04B2237/34; C04B2237/343; C04B2237/50; C04B2237/60; C04B2237/76; C04B2237/765; C04B2237/86
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
68 words
THE METHOD OF FORMING VACUUM TIGHT SEALED BODIES OF A SPINEL OF A DIVALENT METAL OXIDE REACTED WITH AN OXIDE SELECTED FROM THE GROUP CONSISTING OF AL2O3, AND FE2O3 COMPRISING, ASSEMBLING MATING SURFACES OF SUITABLY SHAPED SUB-BODIES COMPOSED OF A STARTING MATERIAL SELECTED FROM THE GROUP CONSISTING OF A1**2O3 AND FE2O3 IN CONJOINT RELATIONSHIP DEFINING A CHAMBER ISOLATED FROM THE SURROUNDING ATMOSPHERE, PLACING THE ASSEMBLED SUB-BODIES IN CON-
Claim 2
Independent Claim
68 words
THE METHOD OF FORMING VACUUM TIGHT SEALED BODIES OF A SPINEL OF A DIVALENT METAL OXIDE REACTED WITH AN OXIDE SELECTED FROM THE GROUP CONSISTING OF AL2O3, AND FE2O3 COMPRISING, ASSEMBLING MATING SURFACES OF SUITABLY SHAPED SUB-BODIES COMPOSED OF A STARTING MATERIAL SELECTED FROM THE GROUP CONSISTING OF A1**2O3 AND FE2O3 IN CONJOINT RELATIONSHIP DEFINING A CHAMBER ISOLATED FROM THE SURROUNDING ATMOSPHERE, PLACING THE ASSEMBLED SUB-BODIES IN CON-
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-03-07 | 1969-09-06 | 1970-03-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-03-07 | 1973-09-06 | 1974-03-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-03-07 | 1977-09-06 | 1978-03-08 | $7700.00 | Window Closed / Lapsed |