US2895839A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of incorporating titanium into selectively transparent silica glass
Assignee: Saint Gobain Quartz SAS
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Filing: 1956-05-14
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Granted: 1959-07-21
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Expires: 1976-05-14
Abstract
No abstract record available.
Inventors
- 👤 Henri J C George
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 03:45
CPC Classifications
C; C03; C03C; C03C3/00; C03C3/04; C03C3/06; Y; Y10; Y10S; Y10S501/00; Y10S501/90; Y10S501/905
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
113 words
IN THE PREPARATION OF SELECTIVELY TRANSPARENT SILICA GLASS BY HEATING TO ABOUT 1750* C. AND THEN COOLING A MIXTURE CONSISTING OF SUBSTANTIALLY PURE SILICON DIOXIDE AND TITANIUM DIOXIDE IN AN AMOUNT EFFECTIVE TO RENDER THE GLASS SUBSTANTIALLY OPAQUE TO LIGHT RADIATION OF 1850 A.U. WHILE BEING TRANSPARENT TO RADIATION OF 2537 A.U., THE METHOD OF INCORPORATING THE TITANIUM INTO THE SILICON DIOXIDE PRIOR TO HEATING COMPRISING MIXTING AN AQUEOUS SOLUTION OF A WATER-SOLUBLE TITANIUM SALT WITH A MASS OF SILICA PARTICLES IN AN AMOUNT TO SUBSTANTIALLY FILL THE VOIDS BETWEEN SAID PARTICLES, ADDING A BASE TO SAID MIXTURE EFFECTIVE TO PRECIPITATE TITANIUM HYDROXIDE, REMOVING THE BY-PRODUCTS FROM SAID PRECIPITATION, AND DRYING THE MIXTURE.
Claim 2
Dependent Claim
113 words
IN THE PREPARATION OF SELECTIVELY TRANSPARENT SILICA GLASS BY HEATING TO ABOUT 1750* C. AND THEN COOLING A MIXTURE CONSISTING OF SUBSTANTIALLY PURE SILICON DIOXIDE AND TITANIUM DIOXIDE IN AN AMOUNT EFFECTIVE TO RENDER THE GLASS SUBSTANTIALLY OPAQUE TO LIGHT RADIATION OF 1850 A.U. WHILE BEING TRANSPARENT TO RADIATION OF 2537 A.U., THE METHOD OF INCORPORATING THE TITANIUM INTO THE SILICON DIOXIDE PRIOR TO HEATING COMPRISING MIXTING AN AQUEOUS SOLUTION OF A WATER-SOLUBLE TITANIUM SALT WITH A MASS OF SILICA PARTICLES IN AN AMOUNT TO SUBSTANTIALLY FILL THE VOIDS BETWEEN SAID PARTICLES, ADDING A BASE TO SAID MIXTURE EFFECTIVE TO PRECIPITATE TITANIUM HYDROXIDE, REMOVING THE BY-PRODUCTS FROM SAID PRECIPITATION, AND DRYING THE MIXTURE.
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) | 1962-07-20 | 1963-01-19 | 1963-07-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-07-20 | 1967-01-19 | 1967-07-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-07-20 | 1971-01-19 | 1971-07-21 | $7700.00 | Window Closed / Lapsed |