Patent US3268320A successfully refreshed from Google Patents.
US3268320A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Glass furnace with means to agitate the molten glass
Assignee: Individual
•
Filing: 1965-06-28
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Granted: 1966-08-23
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Expires: 1985-06-28
Abstract
No abstract record available.
Inventors
- 👤 Harvey L Penberthy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 03:27
CPC Classifications
C; C03; C03B; C03B5/00; C03B5/16; C03B5/18; C03B5/183; C03B5/185; C03B5/02; C03B5/027; C03B5/03; Y; Y02; Y02P; Y02P40/00; Y02P40/50; Y02P40/57
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
119 words
IN A GLASS FURNACE OF THE CONTINUOUS TYPE HAVING SIDE WALLS AND A MELTING ZONE, A FINING ZONE AND A WORKING ZONE, AND A GLASS-SUBMERGED THROAT BETWEEN SAID FINING AND WORKING ZONES, THE IMPROVEMENT COMPRISING: ADJUSTABLE, SPACED GLASS-IMMERSED BUBBLERS PROJECTING INTO SAID FURNACE FROM SUBSURFACE POINTS OF ENTRY AND ARRANGED SUBSTANTIALLY IN A LINE COINCIDENT WITH A LINE EXTENDING LONGITUDINALLY THROUGH SAID FURNACE AND THROUGH SAID THROAT, THE BUBBLER AT THE DOWNSTREAM END OF SAID LINE BEING POSITIONED SUBSTANTIALLY IMMEDIATELY UPSTREAM OF SAID THROAT FOR FORMING TWO SUBSTANTIALLY CONVOLUTED CONVECTION CURRENTS IN THE GLASS IN SAID FURNACE PROGRESSING IN THE DIRECTION OF THE LONGITUDINAL AXIS OF SAID FURNACE, SAID CURRENT-FORMING MEANS BEING LOCATED SUBSTANTIALLY DOWNSTREAM OF SAID MELTING ZONE.
Claim 2
Dependent Claim
119 words
IN A GLASS FURNACE OF THE CONTINUOUS TYPE HAVING SIDE WALLS AND A MELTING ZONE, A FINING ZONE AND A WORKING ZONE, AND A GLASS-SUBMERGED THROAT BETWEEN SAID FINING AND WORKING ZONES, THE IMPROVEMENT COMPRISING: ADJUSTABLE, SPACED GLASS-IMMERSED BUBBLERS PROJECTING INTO SAID FURNACE FROM SUBSURFACE POINTS OF ENTRY AND ARRANGED SUBSTANTIALLY IN A LINE COINCIDENT WITH A LINE EXTENDING LONGITUDINALLY THROUGH SAID FURNACE AND THROUGH SAID THROAT, THE BUBBLER AT THE DOWNSTREAM END OF SAID LINE BEING POSITIONED SUBSTANTIALLY IMMEDIATELY UPSTREAM OF SAID THROAT FOR FORMING TWO SUBSTANTIALLY CONVOLUTED CONVECTION CURRENTS IN THE GLASS IN SAID FURNACE PROGRESSING IN THE DIRECTION OF THE LONGITUDINAL AXIS OF SAID FURNACE, SAID CURRENT-FORMING MEANS BEING LOCATED SUBSTANTIALLY DOWNSTREAM OF SAID MELTING ZONE.
References Cited (Backward Citations)
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Cited
US1552555A
Cited
US2068925A
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US2350734A
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US2283188A
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US2859261A
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US2921106A
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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) | 1969-08-22 | 1970-02-21 | 1970-08-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-08-22 | 1974-02-21 | 1974-08-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-08-22 | 1978-02-21 | 1978-08-23 | $7700.00 | Window Closed / Lapsed |