US3320045A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Furnace for the manufacture of fused quartz
Assignee: Osram GmbH
•
Filing: 1963-06-21
•
Granted: 1967-05-16
•
Expires: 1983-06-21
Abstract
No abstract record available.
Inventors
- 👤 Weiss Werner
- 👤 Vatterodt Karl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 12:46
CPC Classifications
C; C03; C03B; C03B5/00; C03B5/16; C03B5/225; C03B17/00; C03B17/04; C03B3/00; C03B3/02; C03B3/023; C03B32/00; C03B5/02; C03B5/033; C03B5/0336; Y; Y02; Y02P; Y02P40/00; Y02P40/50; Y10; Y10S; Y10S65/00; Y10S65/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
98 words
IN COMBINATION, AN ELECTRIC FURNACE FOR THE CONTINUOUS JPRODUCTION OF FUSED QUARTZ FROM CRYSTALLINE QUARTZ COMPRISING AN ELONGATED CRUCIBLE OPEN AT THE TOP FOR THE INTRODUCTION OF QUARTZ CRYSTALS, AN APERTURE AT THE BOTTOM OF THE CRUCIBLE FOR THE FLOW OF MOLTEN FUSED QUARTZ OUT OF THE CRUCIBLE, A PRETREATMENT FURNACE AND MEANS MUNTING THE PRETREATMENT FURNACE IN COMMUNICATION WITH AND ABOUT THE LEVEL OF THE MELT IN THE CRUCIBLE FOR DELIVERING PRETREATED CRYSTALS BY GRAVITY TO THE CRUCIBLE, MEANS FOR HEATING THE INTERIOR OF THE PRETREATMENT FURNACE TO AN ELEVATED TEMPERATURE LOWER THAN THE MELTING TEMPERATURE OF
Claim 2
Dependent Claim
98 words
IN COMBINATION, AN ELECTRIC FURNACE FOR THE CONTINUOUS JPRODUCTION OF FUSED QUARTZ FROM CRYSTALLINE QUARTZ COMPRISING AN ELONGATED CRUCIBLE OPEN AT THE TOP FOR THE INTRODUCTION OF QUARTZ CRYSTALS, AN APERTURE AT THE BOTTOM OF THE CRUCIBLE FOR THE FLOW OF MOLTEN FUSED QUARTZ OUT OF THE CRUCIBLE, A PRETREATMENT FURNACE AND MEANS MUNTING THE PRETREATMENT FURNACE IN COMMUNICATION WITH AND ABOUT THE LEVEL OF THE MELT IN THE CRUCIBLE FOR DELIVERING PRETREATED CRYSTALS BY GRAVITY TO THE CRUCIBLE, MEANS FOR HEATING THE INTERIOR OF THE PRETREATMENT FURNACE TO AN ELEVATED TEMPERATURE LOWER THAN THE MELTING TEMPERATURE OF
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) | 1970-05-15 | 1970-11-14 | 1971-05-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-05-15 | 1974-11-14 | 1975-05-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-05-15 | 1978-11-14 | 1979-05-16 | $7700.00 | Window Closed / Lapsed |