US3251669A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Glass stream heating in a continuous ribbon furnace
Assignee: Libbey Owens Ford Glass Co
•
Filing: 1963-12-16
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Granted: 1966-05-17
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Expires: 1983-12-16
Abstract
No abstract record available.
Inventors
- 👤 Donald W Dunipace
- 👤 William E Mccown
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 18:21
CPC Classifications
C; C03; C03B; C03B15/00; C03B15/02; C03B15/04; Y; Y02; Y02P; Y02P40/00; Y02P40/50; Y02P40/57
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
149 words
IN A METHOD OF PRODUCING A CONTINUOUS RIBBON OF GLASS FROM A TANK TYPE FURNACE IN WHICH A MASS OF MOLTEN GLASS IS CREATED AND MOVED IN A STREAM SUCCESSIVELY THROUGH A ZONE IN WHICH GLASS IS MELTED, A ZONE IN WHICH THE MOLTEN GLASS IS REFINED, A ZONE IN WHICH THE TEMPERATURE OF SAID REFINED GLASS IS REDUCED AND A WORKING ZONE WITHIN WHICH THE MOLTEN GLASS IS REHEATED AND FROM WHICH SAID RIBBON IS CONTINUOUSLY FORMED AND WITHDRAWN FROM SAID MASS OF MOLTEN GLASS; THE STEP OF EQUALIZING THE LATERAL TEMPERATURES OF THE REFINED MOLTEN GLASS IN SAID STREAM BEFORE IT IS FORMED INTO A RIBBON BY CONTINOUSLY APPLYING HEAT FROM BENEATH THE SURFACE OF SAID MOLTEN GLASS TO A NARROW AREA OF A SUBSURFACE STRATUM EXTENDING COMPLETELY ACROSS THE WIDTH OF SAID STRAM IN SAID TEMPERATURE REDUCING ZONE AND BEFORE IT REACHES SAID HEATED WORKING ZONE.
Claim 2
Dependent Claim
149 words
IN A METHOD OF PRODUCING A CONTINUOUS RIBBON OF GLASS FROM A TANK TYPE FURNACE IN WHICH A MASS OF MOLTEN GLASS IS CREATED AND MOVED IN A STREAM SUCCESSIVELY THROUGH A ZONE IN WHICH GLASS IS MELTED, A ZONE IN WHICH THE MOLTEN GLASS IS REFINED, A ZONE IN WHICH THE TEMPERATURE OF SAID REFINED GLASS IS REDUCED AND A WORKING ZONE WITHIN WHICH THE MOLTEN GLASS IS REHEATED AND FROM WHICH SAID RIBBON IS CONTINUOUSLY FORMED AND WITHDRAWN FROM SAID MASS OF MOLTEN GLASS; THE STEP OF EQUALIZING THE LATERAL TEMPERATURES OF THE REFINED MOLTEN GLASS IN SAID STREAM BEFORE IT IS FORMED INTO A RIBBON BY CONTINOUSLY APPLYING HEAT FROM BENEATH THE SURFACE OF SAID MOLTEN GLASS TO A NARROW AREA OF A SUBSURFACE STRATUM EXTENDING COMPLETELY ACROSS THE WIDTH OF SAID STRAM IN SAID TEMPERATURE REDUCING ZONE AND BEFORE IT REACHES SAID HEATED WORKING ZONE.
References Cited (Backward Citations)
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US2417913A
Cited
US2990438A
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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) | 1969-05-16 | 1969-11-15 | 1970-05-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-05-16 | 1973-11-15 | 1974-05-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-05-16 | 1977-11-15 | 1978-05-17 | $7700.00 | Window Closed / Lapsed |