US2898217A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ceramic products
Assignee: Ohio Brass Co
•
Filing: 1956-08-06
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Granted: 1959-08-04
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Expires: 1976-08-06
Abstract
No abstract record available.
Inventors
- 👤 Selsing Jorgen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 01:01
CPC Classifications
C; C04; C04B; C04B33/00; C04B33/24; C04B33/26
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
123 words
THE PROCESS OF PRODUCING A CERAMIC PRODUCT HAVING A QUARTZ CONTENT OF NO MORE THAN 1 PERCENT OF THE WEIGHT OF THE PRODUCT, WHICH COMPRISES FIRING AT A TEMPERATURE BETWEEN 1150 AND 1400* C. A CERAMIC MIX COMPOSED ESSENTIALLY OF 15 TO 45 PERCENT OF AN ALUMINUM COMPOUND OF THE CLASS CONSISTING OF AL2O3 AND HYDRATES THEREOF, 25 TO 60 PERCENT OF CLAY AND 20 TO 40 PERCENT OF FLUX, THE MIX CONTAINING IN EXCESS OF 1 PERCENT OF QUARTZ PRESENT AS INPURITY IN THE RAW MATERIALS, AND THE FLUX CONTAINING SUFFICIENT SODIUM SILICATE IN WHICH THE RATIO OF THE SODA TO THE SILICA IS AT LEAST 1 TO 10, TO REDUCE THE QUARTZ CONTENT, ON FIRING, TO NO MORE THAN 1 PERCENT.
Claim 2
Dependent Claim
123 words
THE PROCESS OF PRODUCING A CERAMIC PRODUCT HAVING A QUARTZ CONTENT OF NO MORE THAN 1 PERCENT OF THE WEIGHT OF THE PRODUCT, WHICH COMPRISES FIRING AT A TEMPERATURE BETWEEN 1150 AND 1400* C. A CERAMIC MIX COMPOSED ESSENTIALLY OF 15 TO 45 PERCENT OF AN ALUMINUM COMPOUND OF THE CLASS CONSISTING OF AL2O3 AND HYDRATES THEREOF, 25 TO 60 PERCENT OF CLAY AND 20 TO 40 PERCENT OF FLUX, THE MIX CONTAINING IN EXCESS OF 1 PERCENT OF QUARTZ PRESENT AS INPURITY IN THE RAW MATERIALS, AND THE FLUX CONTAINING SUFFICIENT SODIUM SILICATE IN WHICH THE RATIO OF THE SODA TO THE SILICA IS AT LEAST 1 TO 10, TO REDUCE THE QUARTZ CONTENT, ON FIRING, TO NO MORE THAN 1 PERCENT.
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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) | 1962-08-03 | 1963-02-02 | 1963-08-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-08-03 | 1967-02-02 | 1967-08-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-08-03 | 1971-02-02 | 1971-08-04 | $7700.00 | Window Closed / Lapsed |