US3093458A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of spraying multiple coatings of refractory compositions for hot furnace repair
Assignee: Quigley Co Inc
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Filing: 1961-01-17
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Granted: 1963-06-11
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Expires: 1981-01-17
Abstract
No abstract record available.
Inventors
- 👤 Raymond J Demaison
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 19:46
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/01; C04B35/42; C04B35/12; C04B35/44
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
179 words
A METHOD OF PROLONGING THE LIFE OF AN OPEN HEARTH FURNACE LINING, WHICH CONSISTS IN SPRAYING ONTO THE FLAME EXPOSED SURFACE OF SAID LINING WHILE THE FURNACE IS IN FULL OPERATION AT LEAST TWO HIGH TEMPRATURE REFRACTORY MATERIAL COATINGS IN SUPERIMPOSED RELATION, THE FIRST COATING BEING COMPATIBLE WITH THE FURNACE LINING AND CAPABLE OF REACATING WITH THE IROM OXIDE AND SLAG DEPOSITED ON SAID LINING TO FORM SPINELS OF HIGHER REFRACTORINESS THAN THE REFRACTORY MATERIAL OF THE FIRST COATING, AND THE SECOND COATING BEING COMPOSED IN PART OF A REFRACTORY MATERIAL SUCH AS IS PRESENT IN THE FIRST COATING AND IN PART OF ANOTHER MORE REFRACTORY MATERIAL, SAID SECOND COATING BEING COMPATIBLE WITH THE FIRST COATING AND ALSO CAPABLE OF REACTING WITH THE IRON OXIDE AND SLAG DEPOSITED ON SAID LINFIRST COATING TO FORM SPINELS OF HIGHER REFRACTORINESS THAN THE REFRACTORY MATERIALS OF THE SECOND COATING, THE MORE REFRACTORY PART OF THE SECOND COATING HAVING A GREATER CAPACITY THAN THE OTHER PART OF SAID COATING TO ABSORB AND REACT WITH THE IRON OXIDES AND SLAG AS THEY ARE CONTINUALLY
Claim 2
Independent Claim
179 words
A METHOD OF PROLONGING THE LIFE OF AN OPEN HEARTH FURNACE LINING, WHICH CONSISTS IN SPRAYING ONTO THE FLAME EXPOSED SURFACE OF SAID LINING WHILE THE FURNACE IS IN FULL OPERATION AT LEAST TWO HIGH TEMPRATURE REFRACTORY MATERIAL COATINGS IN SUPERIMPOSED RELATION, THE FIRST COATING BEING COMPATIBLE WITH THE FURNACE LINING AND CAPABLE OF REACATING WITH THE IROM OXIDE AND SLAG DEPOSITED ON SAID LINING TO FORM SPINELS OF HIGHER REFRACTORINESS THAN THE REFRACTORY MATERIAL OF THE FIRST COATING, AND THE SECOND COATING BEING COMPOSED IN PART OF A REFRACTORY MATERIAL SUCH AS IS PRESENT IN THE FIRST COATING AND IN PART OF ANOTHER MORE REFRACTORY MATERIAL, SAID SECOND COATING BEING COMPATIBLE WITH THE FIRST COATING AND ALSO CAPABLE OF REACTING WITH THE IRON OXIDE AND SLAG DEPOSITED ON SAID LINFIRST COATING TO FORM SPINELS OF HIGHER REFRACTORINESS THAN THE REFRACTORY MATERIALS OF THE SECOND COATING, THE MORE REFRACTORY PART OF THE SECOND COATING HAVING A GREATER CAPACITY THAN THE OTHER PART OF SAID COATING TO ABSORB AND REACT WITH THE IRON OXIDES AND SLAG AS THEY ARE CONTINUALLY
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) | 1966-06-10 | 1966-12-10 | 1967-06-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-06-10 | 1970-12-10 | 1971-06-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-06-10 | 1974-12-10 | 1975-06-11 | $7700.00 | Window Closed / Lapsed |