Patent US2494277A successfully refreshed from Google Patents.
US2494277A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ceramic body and batch for making
Assignee: —
•
Filing: —
•
Granted: 1950-01-10
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Expires: 1967-01-10
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 15:31
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/01; C04B35/10; C04B35/111
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
28 words
A BATCH FOR THE PRODUCTION OF A CERAMIC BODY, WHICH CONTAINS ABOUT 88% ALUMINA, ABOUT 10% TRI-CALCIUM PENTA-ALUMINATE, BETWEEN 1 TO 2% SILICA, AND ABOUT 1% BORIC ACID.
Claim 2
Dependent Claim
28 words
A BATCH FOR THE PRODUCTION OF A CERAMIC BODY, WHICH CONTAINS ABOUT 88% ALUMINA, ABOUT 10% TRI-CALCIUM PENTA-ALUMINATE, BETWEEN 1 TO 2% SILICA, AND ABOUT 1% BORIC ACID.
References Cited (Backward Citations)
US201910A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-01-09 | 1953-07-11 | 1954-01-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-01-09 | 1957-07-11 | 1958-01-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-01-09 | 1961-07-11 | 1962-01-10 | $7700.00 | Window Closed / Lapsed |