US2678282A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for manufacturing synthetic inorganic silicates or the like
Assignee: Pilkington Group Ltd
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Filing: 1950-06-01
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Granted: 1954-05-11
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Expires: 1970-06-01
Abstract
No abstract record available.
Inventors
- 👤 Jones Clifford
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 02:30
CPC Classifications
C; C01; C01B; C01B33/00; C01B33/20; C04; C04B; C04B35/00; C04B35/01; C04B35/16; C04B35/18
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
76 words
A PROCESS FOR THE MANUFACTURE OF A SYNTHETIC SUBSTITUTE FOR NATURAL MULLITE WHICH COMPRISES CALCINING AN INTIMATE MIXTURE OF ALUMINA, ALUMINIUM SILICATE AND ETHYL SILICATE AS A BINDING AGENT, AT A TEMPERATURE OF BETWEEN 1500* C. AND 1800* C., THE INITIAL PROPORTIONS OF THE INGREDIENTS BEING SUCH THAT IN THE CALCINED MIXTURE THE RATIO OF ALUMINA TO SILICA IS BETWEN 72% AND 78% BY WEIGHT OF AL2O3 AND BETWEEN 28% AND 22% BY WEIGHT OF SIO2.
Claim 2
Dependent Claim
76 words
A PROCESS FOR THE MANUFACTURE OF A SYNTHETIC SUBSTITUTE FOR NATURAL MULLITE WHICH COMPRISES CALCINING AN INTIMATE MIXTURE OF ALUMINA, ALUMINIUM SILICATE AND ETHYL SILICATE AS A BINDING AGENT, AT A TEMPERATURE OF BETWEEN 1500* C. AND 1800* C., THE INITIAL PROPORTIONS OF THE INGREDIENTS BEING SUCH THAT IN THE CALCINED MIXTURE THE RATIO OF ALUMINA TO SILICA IS BETWEN 72% AND 78% BY WEIGHT OF AL2O3 AND BETWEEN 28% AND 22% BY WEIGHT OF SIO2.
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) | 1957-05-10 | 1957-11-09 | 1958-05-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-05-10 | 1961-11-09 | 1962-05-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-05-10 | 1965-11-09 | 1966-05-11 | $7700.00 | Window Closed / Lapsed |