US2665219A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ceramic material
Assignee: —
•
Filing: —
•
Granted: 1954-01-05
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Expires: 1971-01-05
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 19:31
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/01; C04B35/16; C04B35/18; C04B35/195; C04B35/10; C04B35/101; C04B35/1015; C04B2235/00; C04B2235/02; C04B2235/30; C04B2235/32; C04B2235/3201; C04B2235/3203; C04B2235/3205; C04B2235/3206; C04B2235/3208; C04B2235/3217; C04B2235/3231; C04B2235/3232; C04B2235/3244; C04B2235/327; C04B2235/3272; C04B2235/3275; C04B2235/3279; C04B2235/44; C04B2235/444; C04B2235/445
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
39 words
A CERAMIC MATERIAL OF OXIDE COMPOSITION MADE BY FIRING A MIXTURE COMPOSED OF AT LEAST 73.2% ALUMINA, 17.8% CLAY, AND AS FLUXES IN COMPOUND FORM .05% OF EACH OF COBALT, LITHIUM AND MAGNESIUM AND 1% OF CALCIUM AND TITANIUM.
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) | 1957-01-04 | 1957-07-06 | 1958-01-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-01-04 | 1961-07-06 | 1962-01-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-01-04 | 1965-07-06 | 1966-01-05 | $7700.00 | Window Closed / Lapsed |