US3764286A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manufacture of elongated fused quartz member
Assignee: General Electric Co
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Filing: 1971-04-22
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Granted: 1973-10-09
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Expires: 1991-04-22
Abstract
Abstract AN ELONGATED FUSED QUARTZ PRODUCT IS DISCLOSED HAVING IMPROVED OPTICAL TRANSMISSION AND DIMENSIONAL UNIFORMITY WHICH CAN BE PRODUCED CONTINUOUSLY BY A NOVEL PROCESS IN THE FORM OF TUBING, RODS AND THE LIKE FROM PURIFIED SAND MELTED IN AN INDUCTION HEATED FURNACE. THE PRESENT PROCESS FURTHER EMPLOYS PARTICULAR HYDROGEN-HELIUM ATMOSPHERES IN WHICH THE SAND PARTICLES ARE CONTINUOUSLY MELTED AND DRAWN FROM THE INDUCTION HEATED FURNACE TO PROVIDE THE FINAL DESIRED SHAPE. REHEATING OF THE DRAWN ARTICLE IS PRACTICED TO REMOVE ENTRAPPED GAS FOR IMPROVEMENT OF THE FINAL PROPERTIES.
Inventors
- 👤 S Antczak
- 👤 A Getzendiner
- 👤 M Riggert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 02:14
CPC Classifications
C; C03; C03B; C03B17/00; C03B17/04; C03B3/00; C03B5/00; C03B5/02; C03B5/021; C03B5/16; C03B5/225; Y; Y02; Y02P; Y02P40/00; Y02P40/50; Y02P40/57; Y10; Y10S; Y10S65/00; Y10S65/08; Y10S65/09
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-10-08 | 1977-04-09 | 1977-10-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-08 | 1981-04-09 | 1981-10-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-08 | 1985-04-09 | 1985-10-09 | $7700.00 | Window Closed / Lapsed |