Patent US3305340A successfully refreshed from Google Patents.
US3305340A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for generating currents in molten glass
Assignee: PPG Industries Inc
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Filing: 1964-03-04
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Granted: 1967-02-21
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Expires: 1984-03-04
Abstract
No abstract record available.
Inventors
- 👤 Florian V Atkeson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 12:49
CPC Classifications
C; C03; C03B; C03B5/00; C03B5/16; C03B5/18; C03B5/193; C03B5/183; C03B5/185
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
131 words
A METHOD OF GENERATING CURRENTS OF MOVING GLASS IN A TANK OF MOLTEN GLASS HAVING LATERAL SIDES AND A CONTINUOUS FLOW OF GLASS FROM ONE END WHERE BATCH IS INTRODUCED TO AN OPPOSITE END WHERE MOLTEN GLASS IS WITHDRAWN, THE STEPS COMPRISING ELECTRICALLY HEATING THE MOLTEN GLASS BENEATH THE SURFACE OF THE MOLTEN GLASS AND AT SPACED LOCATIONS ALONG AND CLOSELY ADJACENT THE LATERAL SIDES OF SAID TANK, AND SIMULTANEOUSLY INTRODUCING INERT GAS INTO THE MOLTEN GLASS AT THE SAME SPACED LOCATIONS WHERE THE HEAT IS GENERATED SO AS TO EMIT BUBBLES OF INERT GAS INTO THE GLASS AT SAID SPACED LOCATIONS, WHEREBY CURRENTS OF GLASS ARE CUASED TO MOVE UPWARDLY ADJACENT THE LATERAL SIDES OF THE TANK AND THENCE CENTRALLY OF THE TANK ADJACENT THE SURFACE OF THE MOLTEN BATH.
Claim 2
Independent Claim
131 words
A METHOD OF GENERATING CURRENTS OF MOVING GLASS IN A TANK OF MOLTEN GLASS HAVING LATERAL SIDES AND A CONTINUOUS FLOW OF GLASS FROM ONE END WHERE BATCH IS INTRODUCED TO AN OPPOSITE END WHERE MOLTEN GLASS IS WITHDRAWN, THE STEPS COMPRISING ELECTRICALLY HEATING THE MOLTEN GLASS BENEATH THE SURFACE OF THE MOLTEN GLASS AND AT SPACED LOCATIONS ALONG AND CLOSELY ADJACENT THE LATERAL SIDES OF SAID TANK, AND SIMULTANEOUSLY INTRODUCING INERT GAS INTO THE MOLTEN GLASS AT THE SAME SPACED LOCATIONS WHERE THE HEAT IS GENERATED SO AS TO EMIT BUBBLES OF INERT GAS INTO THE GLASS AT SAID SPACED LOCATIONS, WHEREBY CURRENTS OF GLASS ARE CUASED TO MOVE UPWARDLY ADJACENT THE LATERAL SIDES OF THE TANK AND THENCE CENTRALLY OF THE TANK ADJACENT THE SURFACE OF THE MOLTEN BATH.
Claim 3
Dependent Claim
117 words
APPARATUS FOR CONTINUOUSLY MELTING AND FINING GLASS INCLUDING, IN COMBINATION, A REFRACTORY TANK HAVING TWO LATERAL SIDES, ONE END WHERE GLASS BATCH IS INTRODUCED, AN OPPOSITE END WHERE MOLTEN GLASS IS REMOVED AND AN INTERMEDIATE PORTION WHERE THE BATCH IS MELTED TO FORM GLASS AND THE GLASS IS REFINED TO IMPROVE QUALITY; AND TWO ROWS OF SPACED, UPRIGHT, ELECTRODE-BUBBLERS WITHIN THE TANK AND BELOW THE SURFACE OF THE MOLTEN GLASS, ONE ROW EXTENDING ALONG AND CLOSELY ADJACENT A PORTION OF EACH LATERAL SIDE OF THE TANK, EACH ELECTRODE-BUBBLER BEING COMPRISED OF A HOLLOW ELECTRODE ROD, MEANS TO SUPPLY GAS UNDER PRESSURE TO THE HOLLOW KPORTION OF SAID ELECTRODES, AND MEANS TO SIMULTANEOUSLY SUPPLY CURRENT TO SAID ELECTRODES.
Claim 4
Dependent Claim
117 words
APPARATUS FOR CONTINUOUSLY MELTING AND FINING GLASS INCLUDING, IN COMBINATION, A REFRACTORY TANK HAVING TWO LATERAL SIDES, ONE END WHERE GLASS BATCH IS INTRODUCED, AN OPPOSITE END WHERE MOLTEN GLASS IS REMOVED AND AN INTERMEDIATE PORTION WHERE THE BATCH IS MELTED TO FORM GLASS AND THE GLASS IS REFINED TO IMPROVE QUALITY; AND TWO ROWS OF SPACED, UPRIGHT, ELECTRODE-BUBBLERS WITHIN THE TANK AND BELOW THE SURFACE OF THE MOLTEN GLASS, ONE ROW EXTENDING ALONG AND CLOSELY ADJACENT A PORTION OF EACH LATERAL SIDE OF THE TANK, EACH ELECTRODE-BUBBLER BEING COMPRISED OF A HOLLOW ELECTRODE ROD, MEANS TO SUPPLY GAS UNDER PRESSURE TO THE HOLLOW KPORTION OF SAID ELECTRODES, AND MEANS TO SIMULTANEOUSLY SUPPLY CURRENT TO SAID ELECTRODES.
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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) | 1970-02-20 | 1970-08-22 | 1971-02-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-02-20 | 1974-08-22 | 1975-02-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-02-20 | 1978-08-22 | 1979-02-21 | $7700.00 | Window Closed / Lapsed |