US2946703A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and composition for combating slag formation on refractory surfaces
Assignee: ChampionX LLC
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Filing: 1956-04-16
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Granted: 1960-07-26
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Expires: 1976-04-16
Abstract
No abstract record available.
Inventors
- 👤 Thompson Harris
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 07:50
CPC Classifications
C; C04; C04B; C04B41/00; C04B41/009; C04B41/45; C04B41/50; C04B41/5025; C04B41/5029; C04B41/80; C04B41/81; C04B41/85; C04B41/87; C04B2111/00; C04B2111/00474; C04B2111/0087
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
64 words
IN A REGENERATIVE GAS PREHEATING METHOD WHEREIN HOT EFFLUENT GASES CONTAINING SLAG-FORMING MATERIALS ARE CONDUCTED OVER REGENERATIVE REFRACTORY SURFACES TO TRANSFER HEAT THERETO, AND FRESH GASES ARE CONDUCTED OVER THE THUS HEATED REFRACTORIES TO TRANSFER HEAT FROM THE REFRACTORIES TO THE FRESH GASES, THE IMPROVEMENT FOR COMBATING SLAG FORMATION ON SAID REFRACTORY SURFACES WHICH COMPRISES PROVIDING A COAT OF MAGNESIUM OXIDE ON SAID SURFACES.
Claim 2
Dependent Claim
64 words
IN A REGENERATIVE GAS PREHEATING METHOD WHEREIN HOT EFFLUENT GASES CONTAINING SLAG-FORMING MATERIALS ARE CONDUCTED OVER REGENERATIVE REFRACTORY SURFACES TO TRANSFER HEAT THERETO, AND FRESH GASES ARE CONDUCTED OVER THE THUS HEATED REFRACTORIES TO TRANSFER HEAT FROM THE REFRACTORIES TO THE FRESH GASES, THE IMPROVEMENT FOR COMBATING SLAG FORMATION ON SAID REFRACTORY SURFACES WHICH COMPRISES PROVIDING A COAT OF MAGNESIUM OXIDE ON SAID SURFACES.
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) | 1963-07-26 | 1964-01-25 | 1964-07-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-07-26 | 1968-01-25 | 1968-07-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-07-26 | 1972-01-25 | 1972-07-26 | $7700.00 | Window Closed / Lapsed |