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US3224855A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process and furnace for melting and working products such as glass
Assignee: AGC Glass Europe SA
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Filing: 1961-11-14
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Granted: 1965-12-21
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Expires: 1981-11-14
Abstract
No abstract record available.
Inventors
- 👤 Plumat Emile
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 20:45
CPC Classifications
C; C03; C03B; C03B5/00; C03B5/16; C03B5/235; C03B5/2356; C03B5/12; C03B5/18; C03B5/183; C03B5/185; C03B5/193; C03B5/20; C03B5/225; Y; Y10; Y10S; Y10S266/00; Y10S266/90
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
100 words
IN A FURNACE FOR MELTING AND WORKING PRODUCTS SUCH AS GLASS HAVING A CRUCIBLE TO CONTAIN MELTING AND MOLTEN PRODUCT, A VERTICLE SHAFT ABOVE SAID CRUCIBLE FOR INTRODUCTION AND PREHEATING OF RAW MATERIAL, A REFINING CHAMBER, AND A SUBMERGED DUCT CONNECTING SAID CRUCIBLE LATERALLY TO SAID CHAMBER, THE IMPROVEMENT IN COMBINATION THEREWITH OF BURNER MEANS ADAPTED TO INJECT BURNING GASES INTO SAID CRUCIBLE BETWEEN THE SURFACE OF SAID PRODUCT AND SAID DUCT SUFFICIENT TO AGITATE A TOP ZONE OF SAID PRODUCT, SAID CRUCIBLE HAVING SUFFICIENT DEPTH BELOW SAID BURNER MEANS TO PROVIDE A CALM MOLTEN ZONE BELOW SAID TOP ZONE.
Claim 2
Dependent Claim
100 words
IN A FURNACE FOR MELTING AND WORKING PRODUCTS SUCH AS GLASS HAVING A CRUCIBLE TO CONTAIN MELTING AND MOLTEN PRODUCT, A VERTICLE SHAFT ABOVE SAID CRUCIBLE FOR INTRODUCTION AND PREHEATING OF RAW MATERIAL, A REFINING CHAMBER, AND A SUBMERGED DUCT CONNECTING SAID CRUCIBLE LATERALLY TO SAID CHAMBER, THE IMPROVEMENT IN COMBINATION THEREWITH OF BURNER MEANS ADAPTED TO INJECT BURNING GASES INTO SAID CRUCIBLE BETWEEN THE SURFACE OF SAID PRODUCT AND SAID DUCT SUFFICIENT TO AGITATE A TOP ZONE OF SAID PRODUCT, SAID CRUCIBLE HAVING SUFFICIENT DEPTH BELOW SAID BURNER MEANS TO PROVIDE A CALM MOLTEN ZONE BELOW SAID TOP ZONE.
Claim 3
Dependent Claim
113 words
IN A PROCESS FOR MELTING AND WORKING PRODUCTS SUCH AS GLASS IN A SHAFT FURNACE HAVING A CRUCIBLE OF MOLTEN AND MELTING PRODUCTS AND A REFINING CHAMBER, SAID PROCESS INCLUDING LATERALLY INJECTING BURNING GASES INTO SAID CRUCIBLE, AND REMOVING MOLTEN GLASS FROM SAID CRUCIBLE TO SAID REFINING CHAMBER THROUGH A CHANNEL BELOW THE MOLTEN SURFACE THEREOF, THE IMPROVEMENT IN COMBINATION THEREWITH COMPRISING INJECTING AT A POSITION SAID BURNING GASES AT A SUFFICIENT RATE AND A SUFFICIENT DISTANCE BELOW SAID SURFACE TO CREATE A TOP MELTING ZONE OF AGITATED PRODUCT AND AT A SUFFICIENT DISTANCE ABOVE SAID CHANNEL TO PROVIDE A BOTTOM CALM MOLTEN ZONE BETWEEN SAID TOP AGITATED MELTING ZONE AND SAID CHANNEL.
Claim 4
Dependent Claim
113 words
IN A PROCESS FOR MELTING AND WORKING PRODUCTS SUCH AS GLASS IN A SHAFT FURNACE HAVING A CRUCIBLE OF MOLTEN AND MELTING PRODUCTS AND A REFINING CHAMBER, SAID PROCESS INCLUDING LATERALLY INJECTING BURNING GASES INTO SAID CRUCIBLE, AND REMOVING MOLTEN GLASS FROM SAID CRUCIBLE TO SAID REFINING CHAMBER THROUGH A CHANNEL BELOW THE MOLTEN SURFACE THEREOF, THE IMPROVEMENT IN COMBINATION THEREWITH COMPRISING INJECTING AT A POSITION SAID BURNING GASES AT A SUFFICIENT RATE AND A SUFFICIENT DISTANCE BELOW SAID SURFACE TO CREATE A TOP MELTING ZONE OF AGITATED PRODUCT AND AT A SUFFICIENT DISTANCE ABOVE SAID CHANNEL TO PROVIDE A BOTTOM CALM MOLTEN ZONE BETWEEN SAID TOP AGITATED MELTING ZONE AND SAID CHANNEL.
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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) | 1968-12-20 | 1969-06-21 | 1969-12-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-12-20 | 1973-06-21 | 1973-12-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-12-20 | 1977-06-21 | 1977-12-21 | $7700.00 | Window Closed / Lapsed |