US3238030A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for preventing scale in glass furnace
Assignee: Libbey Owens Ford Glass Co
•
Filing: 1961-03-28
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Granted: 1966-03-01
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Expires: 1981-03-28
Abstract
No abstract record available.
Inventors
- 👤 Thomas B O'connell
- 👤 Howard R Swift
- 👤 James E Mambourg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 04:00
CPC Classifications
C; C03; C03B; C03B5/00; C03B5/16; C03B5/42; Y; Y02; Y02P; Y02P40/00; Y02P40/50; Y02P40/57
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
127 words
IN A PROCESS FOR REDUCING THE FORMATION OF CRYSTALLINE SCALE ON SILICA REFRACTORY FORMING THE ROOF AND SIDE WALLS OF A GLASS MELTING FURNACE, THE STEPS OF, OPERATING THE FURNACE FOR APERIOD OF TIME TO PERMIT ALKALI AND SULFATE VAPORS FROM THE MOLTEN GLASS AND THE BATCH MATERIALS TO BUILD UP IN THE FURNACE, THEREAFTER INTRODUCING A REDUCING GAS INTO THE FURNACE TO MAINTAIN REDUCING CONDITIONS ADJACENT SAID REFRACTORY THEREBY TO REDUCE SAID VAPORS AND PROMOTE A REACTION BETWEEN THE VAPORS AND SAID SILICA REFRACTORY RESULTING IN A LIQUID GLASS OPERABLE TO CEMENT SAID SCALE ON THE SURFACE OF SAID REFRACTORY, AND REGULATING THE AMOUNT OF SAID REDUCING GAS BEING INTRODUCED INTO SAID FURNACE TO MAINTAIN THE ATMOSPHERE AT REDUCING CONDITIONS BUT INSUFFICIENT TO REDUCE THE MELT.
Claim 2
Dependent Claim
127 words
IN A PROCESS FOR REDUCING THE FORMATION OF CRYSTALLINE SCALE ON SILICA REFRACTORY FORMING THE ROOF AND SIDE WALLS OF A GLASS MELTING FURNACE, THE STEPS OF, OPERATING THE FURNACE FOR APERIOD OF TIME TO PERMIT ALKALI AND SULFATE VAPORS FROM THE MOLTEN GLASS AND THE BATCH MATERIALS TO BUILD UP IN THE FURNACE, THEREAFTER INTRODUCING A REDUCING GAS INTO THE FURNACE TO MAINTAIN REDUCING CONDITIONS ADJACENT SAID REFRACTORY THEREBY TO REDUCE SAID VAPORS AND PROMOTE A REACTION BETWEEN THE VAPORS AND SAID SILICA REFRACTORY RESULTING IN A LIQUID GLASS OPERABLE TO CEMENT SAID SCALE ON THE SURFACE OF SAID REFRACTORY, AND REGULATING THE AMOUNT OF SAID REDUCING GAS BEING INTRODUCED INTO SAID FURNACE TO MAINTAIN THE ATMOSPHERE AT REDUCING CONDITIONS BUT INSUFFICIENT TO REDUCE THE MELT.
References Cited (Backward Citations)
US2994519A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-02-28 | 1969-08-30 | 1970-03-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-02-28 | 1973-08-30 | 1974-03-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-02-28 | 1977-08-30 | 1978-03-01 | $7700.00 | Window Closed / Lapsed |