US3594259A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Continuous heat treatment of glass-forming materials
Assignee: Pilkington Group Ltd
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Filing: 1968-03-12
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Granted: 1971-07-20
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Expires: 1988-03-12
Abstract
Abstract MOLTEN GLASS IS PRODUCED BY CONTINUOUSLY DISTRIBUTING GLASS-FORMING MATERIALS ONTO A MOVING (E.G. A ROTATING) HEARTH, EXPOSING THE MATERIALS TO HIGH TEMPERATURE WHILE THE MATERIALS REMAIN STATIONARY RELATIVE TO THE HEARTH AND ARE MOVED BY THE HEARTH THROUGH A FURNACE CHAMBER TO CONVERT THE MATERIALS INTO MOLTEN GLASS, AND DIRECTING THE MOLTEN GLASS OVER AN EDGE OF THE HEARTH AS A CONTINUOUS STREAM.
Inventors
- 👤 Ernesto Coen
- 👤 John Victor Alderson
- 👤 Robert Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 04:12
CPC Classifications
C; C03; C03B; C03B5/00; C03B5/14
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-07-19 | 1975-01-18 | 1975-07-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-07-19 | 1979-01-18 | 1979-07-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-07-19 | 1983-01-18 | 1983-07-20 | $7700.00 | Window Closed / Lapsed |