US3113855A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of increasing annealing point of high silica glass
Assignee: Corning Glass Works
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Filing: 1960-06-27
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Granted: 1963-12-10
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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
2026-10-23 01:54
CPC Classifications
C; C03; C03C; C03C15/00; C03C3/00; C03C3/04; C03C3/06; C03C2201/00; C03C2201/06; C03C2201/08; C03C2201/10; C03C2201/30; C03C2201/32; C03C2203/00; C03C2203/10; C03C2203/50
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
75 words
THE METHOD OF IMPROVING THE ANNEALING POINT OF A 96% SILICA GLASS ARTICLE MADE BY THE CONSOLIDATION OF A HIGH SILICA GLASS ARTICLE CONTAINING THROUGHOUT ITS MASS A PLURALITY OF INTERCOMMUNICATING SUBMICROSCOPIC PORES WHICH INCLUDES HEATING THE POROUS GLASS BODY AT A TEMPERATURE OF 750*-1050*C. FOR AT LEASTS 1 HOUR, LEACHING THE THUS HEAT-TREATED POROUS GLASS BODY IN AN ACID LEACH BATH AND THEREAFTER CONSOLIDATING THE RELEACHED POROUS GLASS BODY AT A TEMPERATURE OF 1300*-1350*C.
Claim 2
Independent Claim
75 words
THE METHOD OF IMPROVING THE ANNEALING POINT OF A 96% SILICA GLASS ARTICLE MADE BY THE CONSOLIDATION OF A HIGH SILICA GLASS ARTICLE CONTAINING THROUGHOUT ITS MASS A PLURALITY OF INTERCOMMUNICATING SUBMICROSCOPIC PORES WHICH INCLUDES HEATING THE POROUS GLASS BODY AT A TEMPERATURE OF 750*-1050*C. FOR AT LEASTS 1 HOUR, LEACHING THE THUS HEAT-TREATED POROUS GLASS BODY IN AN ACID LEACH BATH AND THEREAFTER CONSOLIDATING THE RELEACHED POROUS GLASS BODY AT A TEMPERATURE OF 1300*-1350*C.
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) | 1966-12-09 | 1967-06-10 | 1967-12-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-12-09 | 1971-06-10 | 1971-12-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-12-09 | 1975-06-10 | 1975-12-10 | $7700.00 | Window Closed / Lapsed |