US3240581A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for treating glass furnace
Assignee: Libbey Owens Ford Glass Co
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Filing: 1961-09-12
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Granted: 1966-03-15
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Expires: 1981-09-12
Abstract
No abstract record available.
Inventors
- 👤 Thomas B O'connell
- 👤 Delmar E Carney
- 👤 Donald E Shamp
- 👤 Jr Clarence A Gartz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 05:36
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
87 words
IN A PROCESS FOR TREATING SILICA REFRACTORY FORMING THE ROOF AND SIDE WALLS FO A GLASS MELTING FURNACE TO ELIMINATE A CRYSTALLINE SCALE FORMATION THEREON, THE STEPS OF, INTRODUCING A SODIUM-SULFUR COMPOUND INTO THE FURNANCE AND ONTO SAID REFRACTORY ABOVE THE GLASS MELT IN THE FURNACE, INTRODUCING A SOURCE OF REDUCING GAS IN SAID FURNACE ADJACENT SAID REFRACTORY, AND REGULATING THE AMOUNT OF SAID SOURCE OF REDUCING GAS BEING INTRODUCED INTO SAID FURNACE TO MAINTAIN THE ATMOSPHERE AT REDUCING CONDITIONS BUT INSUFFICIENT TO REDUCE THE GLASS MELT.
Claim 2
Dependent Claim
87 words
IN A PROCESS FOR TREATING SILICA REFRACTORY FORMING THE ROOF AND SIDE WALLS FO A GLASS MELTING FURNACE TO ELIMINATE A CRYSTALLINE SCALE FORMATION THEREON, THE STEPS OF, INTRODUCING A SODIUM-SULFUR COMPOUND INTO THE FURNANCE AND ONTO SAID REFRACTORY ABOVE THE GLASS MELT IN THE FURNACE, INTRODUCING A SOURCE OF REDUCING GAS IN SAID FURNACE ADJACENT SAID REFRACTORY, AND REGULATING THE AMOUNT OF SAID SOURCE OF REDUCING GAS BEING INTRODUCED INTO SAID FURNACE TO MAINTAIN THE ATMOSPHERE AT REDUCING CONDITIONS BUT INSUFFICIENT TO REDUCE THE GLASS MELT.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-03-14 | 1969-09-13 | 1970-03-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-03-14 | 1973-09-13 | 1974-03-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-03-14 | 1977-09-13 | 1978-03-15 | $7700.00 | Window Closed / Lapsed |