Patent US3198619A successfully refreshed from Google Patents.
US3198619A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tubular forehearth for glass furnace
Assignee: OI Glass Inc
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Filing: 1960-12-16
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Granted: 1965-08-03
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Expires: 1980-12-16
Abstract
No abstract record available.
Inventors
- 👤 Robert E Nuzum
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 18:21
CPC Classifications
C; C03; C03B; C03B7/00; C03B7/02; C03B7/06; C03B7/07; Y; Y10; Y10S; Y10S65/00; Y10S65/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
117 words
IN A GLASS FURNACE INCLUDING A REFINER WHEREIN A BODY OF MOLTEN GLASS IS CONTINUOUSLY UNDERGOING REFINING, THE IMPROVEMENT THEREIN OF A FOREHEARTH COMPRISING AN ELONGATED TUBULAR STRUCTURE DEFINING A SUBSTANTIALLY HORIZONTAL CYLINDRICAL CHANNEL, SAID CHANNEL BEING CONNECTED AT ONE END TO THE GLASS IN THE REFINER AT AN OUTLET SUBMERGED IN THE BODY OF MOLTEN GLASS THEREIN, A GLASS FEEDER DEVICE CONNECTED TO THE OTHER END OF SAID CHANNEL, AND A PLURALITY OF ELECTRODES MOUNTED ON SAID TUBULAR STRUCTURE AND EXTENDING INTO THE GLASS CONTAINED IN SAID CHANNEL, THE ELECTRODES OPERABLE UPON BEING ELECTRICALLY ENERGIZED FOR SUPPLYING HEAT TO THE GLASS IN THE CHANNEL BY JOULE EFFECT HEATING OF CURRENT PASSED THROUGH SAID GLASS DISPOSED THEREBETWEEN.
Claim 2
Dependent Claim
117 words
IN A GLASS FURNACE INCLUDING A REFINER WHEREIN A BODY OF MOLTEN GLASS IS CONTINUOUSLY UNDERGOING REFINING, THE IMPROVEMENT THEREIN OF A FOREHEARTH COMPRISING AN ELONGATED TUBULAR STRUCTURE DEFINING A SUBSTANTIALLY HORIZONTAL CYLINDRICAL CHANNEL, SAID CHANNEL BEING CONNECTED AT ONE END TO THE GLASS IN THE REFINER AT AN OUTLET SUBMERGED IN THE BODY OF MOLTEN GLASS THEREIN, A GLASS FEEDER DEVICE CONNECTED TO THE OTHER END OF SAID CHANNEL, AND A PLURALITY OF ELECTRODES MOUNTED ON SAID TUBULAR STRUCTURE AND EXTENDING INTO THE GLASS CONTAINED IN SAID CHANNEL, THE ELECTRODES OPERABLE UPON BEING ELECTRICALLY ENERGIZED FOR SUPPLYING HEAT TO THE GLASS IN THE CHANNEL BY JOULE EFFECT HEATING OF CURRENT PASSED THROUGH SAID GLASS DISPOSED THEREBETWEEN.
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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) | 1968-08-02 | 1969-02-01 | 1969-08-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-08-02 | 1973-02-01 | 1973-08-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-08-02 | 1977-02-01 | 1977-08-03 | $7700.00 | Window Closed / Lapsed |