US3149946A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of improving the infrared transmittance of high silica glass
Assignee: Corning Glass Works
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Filing: 1960-06-27
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Granted: 1964-09-22
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Expires: 1980-06-27
Abstract
No abstract record available.
Inventors
- 👤 Thomas H Elmer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 11:35
CPC Classifications
C; C03; C03B; C03B32/00; C03C; C03C23/00; C03C3/00; C03C3/04; C03C3/06; C03C3/061; C03B2201/00; C03B2201/06; C03B2201/20; C03B2201/24
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
85 words
THE METHOD OF IMPROVING THE PROPERTIES OF A 96% SILICA GLASS ARTICLE MADE BY THE CONSOLIDATION OF A HIGH SILICA GLASS ARTICLE CONSISTING THROUGHOUT ITS MASS A MULTIPLICITY OF INTERCOMMUNICATING SUBMICROSCOPIC PORES WHICH CONSISTS OF HEATING THE POROUS GLASS BODY TO A TEMPERATURE OF 900*-1050*C. IN AN ATMOSPHERE CONSISTING ESSENTIALLY OF AMMONIA AND ITS DISSOCIATIN PRODUCTS, SUBSEQUENTLY HEATING THE BODY TO A TEMPERATURE OF 900*1050*C. IN AN ATMOSPHERE CONSISTING ESSENTIALLY OF AN OXIDIZING GAS, AND THEREAFTER CONSOLIDATING THE THUS TREATED GLASS TO THE NON-POROUS CONDITION.
Claim 2
Independent Claim
85 words
THE METHOD OF IMPROVING THE PROPERTIES OF A 96% SILICA GLASS ARTICLE MADE BY THE CONSOLIDATION OF A HIGH SILICA GLASS ARTICLE CONSISTING THROUGHOUT ITS MASS A MULTIPLICITY OF INTERCOMMUNICATING SUBMICROSCOPIC PORES WHICH CONSISTS OF HEATING THE POROUS GLASS BODY TO A TEMPERATURE OF 900*-1050*C. IN AN ATMOSPHERE CONSISTING ESSENTIALLY OF AMMONIA AND ITS DISSOCIATIN PRODUCTS, SUBSEQUENTLY HEATING THE BODY TO A TEMPERATURE OF 900*1050*C. IN AN ATMOSPHERE CONSISTING ESSENTIALLY OF AN OXIDIZING GAS, AND THEREAFTER CONSOLIDATING THE THUS TREATED GLASS TO THE NON-POROUS CONDITION.
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) | 1967-09-22 | 1968-03-23 | 1968-09-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-09-22 | 1972-03-23 | 1972-09-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-09-22 | 1976-03-23 | 1976-09-22 | $7700.00 | Window Closed / Lapsed |