Composition and method for preparing metal for cold-working
Abstract
Abstract METAL IS PREPARED FOR COLD WORKING BY COATING IT WITH AN AQUEOUS, SOAP-BASE LUBRICANT COMPRISING A MELTABLE, WATER-SOLUBLE INORGANIC PIGMENT, PREFERABLY BORAX AND SODIUM NITRITE, PREFERABLY A HIGH MOLECULAR WEIGHT ESTER OF A PHOSPHORIC ACID, AND AT LEAST ONE OF THE GROUP CONSISTING OF WATER-SWELLABLE ORGANIC POLYMERS, AND HYDROPHILIC COLLOIDS OR HYDROPHILIC CARBOHYDRATES TO INCREASE VISCOSITY. SAID COATING IS APPLIED UNDER CONDITIONS WHEREIN THE METAL IS HEATED ABOVE 150*F., PREFERABLY 170 TO 210*F., EXCESS WATER IS VAPORIZED, AND A MOLTEN SOAP BASE FILM IS PRODUCED. THE FILM IS THEN RAPIDLY AND ARTIFICIALLY COOLED, AS WITH AIR JETS, TO CONVERT THE FILM TO THE SOLID STATE TO PREVENT GROWTH OF PRECIPITATED PIGMENT CRYSTALS.
Inventors
- 👤 G Orozco
Bibliographic Details
Claims Analysis
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-04-02 | 1976-10-02 | 1977-04-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-04-02 | 1980-10-02 | 1981-04-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-04-02 | 1984-10-02 | 1985-04-03 | $7700.00 | Window Closed / Lapsed |