Method of applying a thermal insulating coating to an ingot wall
Abstract
Abstract A METHOD AND COMPOSITION FOR APPLYING THERMALLY INSULATING COATINGS TO INGOT MOLDS, BY SPRAY COATING A SUBSTANTIALLY NONAQUEOUS SUSPENSION OF REFRACTORY MATERIAL SUCH AS SILICA, ALUMINA, ZIRCONIA OR MAGNESIA, PASSING THROUGH A SCREEN HAVING A MESH OPENING OF 0.149 MM., A LOW DENSITY HEAT-INSULATING MATERIAL SUCH AS PEARLITE, DIATOMACEOUS EARTH OR WOOD FLOOR, PASSING THROUGH A SCREEN HAVING A MESH OPENING OF O.297 MM., A BINDER FOR GREEN STRENGTH WHICH IS FLOCCULABLE CLAY SUCH AS BENTONITE, AND A BINDER FOR DRY STRENGTH WHICH IS A SYNTHETIC RESIN OR SODIUM SILICATE OR GUM ARABIC, IN SUSPENSION IN AN ALCOHOL HAVING 1-3 CARBON ATOMS WHITE SPIRIT OR TOLUENE. THE SPRAYED PARTICLES AND THE SPRAYED SURFACE ARE GIVEN OPPOSITE ELECTRICAL CHARGES TO ATTRACT THE PARTICLES TO THE SURFACE.
Inventors
- 👤 Pierre Blancquart
Bibliographic Details
Claims Analysis
Total Claims: 0References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-08-29 | 1976-02-28 | 1976-08-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-29 | 1980-02-28 | 1980-08-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-29 | 1984-02-28 | 1984-08-29 | $7700.00 | Window Closed / Lapsed |