US2563367A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manufacture of lead silicate
Assignee: Goodlass Wall and Lead Industries Ltd
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Filing: 1949-02-21
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Granted: 1951-08-07
•
Expires: 1969-02-21
Abstract
No abstract record available.
Inventors
- 👤 Read Norman John
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 01:11
CPC Classifications
C; C01; C01B; C01B33/00; C01B33/20; C01G; C01G21/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
76 words
A PROCESS FOR MAKING HYDRATED LEAD SILICATE, BY INTERACTION IN THE PRESENCE OF WATER BETWEEN SILICIC ACID AND A COMPOUND SELECTED FROM THE GROUP CONSISTING OF LEAD MONOXIDE AND LEAD HYDROXIDE, WHICH CONSISTS IN GRINDING IN WATER A MIXTURE OF SILICIC ACID AND SAID COMPOUND WITHOUT PRELIMINARY FURNACING OF SAID MIXTURE AND IN THE PRESENCE OF AN ACID CATALYST, AND THEREAFTER SEPARATING THE RESULTING HYDRATED LEAD SILICATE FROM THE WATER, AND DRYING SAID HYDRATED LEAD SILICATE.
Claim 2
Dependent Claim
76 words
A PROCESS FOR MAKING HYDRATED LEAD SILICATE, BY INTERACTION IN THE PRESENCE OF WATER BETWEEN SILICIC ACID AND A COMPOUND SELECTED FROM THE GROUP CONSISTING OF LEAD MONOXIDE AND LEAD HYDROXIDE, WHICH CONSISTS IN GRINDING IN WATER A MIXTURE OF SILICIC ACID AND SAID COMPOUND WITHOUT PRELIMINARY FURNACING OF SAID MIXTURE AND IN THE PRESENCE OF AN ACID CATALYST, AND THEREAFTER SEPARATING THE RESULTING HYDRATED LEAD SILICATE FROM THE WATER, AND DRYING SAID HYDRATED LEAD SILICATE.
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) | 1954-08-06 | 1955-02-05 | 1955-08-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-08-06 | 1959-02-05 | 1959-08-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-08-06 | 1963-02-05 | 1963-08-07 | $7700.00 | Window Closed / Lapsed |