US2867888A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of firing alumina ceramics
Assignee: Motors Liquidation Co
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Filing: 1955-01-03
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Granted: 1959-01-13
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Expires: 1975-01-03
Abstract
No abstract record available.
Inventors
- 👤 Carl F Schaefer
- 👤 Schwartzwalder Karl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 00:22
CPC Classifications
B; B28; B28B; B28B11/00; B28B11/24; B28B11/243
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
49 words
A METHOD FOR FIRING A CERAMIC BODY OF THE TYPE CONTAINING AT LEAST ABOUT 90% ALUMINA AND REQUIRING A FIRING TEMPERATURE ON THE ORDER OF AT LEAST ABOUT 3100* F., SAID METHOD COMPRISING THE STEPS OF SUPPORTING SAID BODY ON A SINTERED MASS CONSISTING ESSENTIALLY OF FROM 80% TO
Claim 2
Independent Claim
49 words
A METHOD FOR FIRING A CERAMIC BODY OF THE TYPE CONTAINING AT LEAST ABOUT 90% ALUMINA AND REQUIRING A FIRING TEMPERATURE ON THE ORDER OF AT LEAST ABOUT 3100* F., SAID METHOD COMPRISING THE STEPS OF SUPPORTING SAID BODY ON A SINTERED MASS CONSISTING ESSENTIALLY OF FROM 80% TO
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) | 1962-01-12 | 1962-07-14 | 1963-01-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-01-12 | 1966-07-14 | 1967-01-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-01-12 | 1970-07-14 | 1971-01-13 | $7700.00 | Window Closed / Lapsed |