Claims for Patent: 3,954,512

Summary for Patent: 3,954,512

Title:	Protective coating of ferrous base metal articles
Abstract:	Iron, steel, and iron base alloys are provided with coatings made by forming an adherent oxide layer on the surface, treating the oxide layer with at least one Group III metal, then oxidizing the Group III metal, after which the oxidized Group III metal is treated with pyrochlore-microlite mineral. The coatings are useful for providing corrosion and oxidation resistance, particularly at elevated temperatures.
Inventor(s):	Kanter; Jerome J. (Palos Park, IL)
Assignee:
Application Number:	05/532,461
Patent Claims:	1. In a process for providing a coating on a ferrous base metal having an adherent oxide layer formed on a surface thereof, the steps comprising: frictionally contacting said oxide layer of the ferrous base metal article with at least one metal in solid phase from Group III of the periodic table in order to complex said Group III metal with said oxide layer and form a coating thereon, said Group III metal selected from the class consisting of aluminum, scandium, yttrium, and the rare earth metals, oxidizing at least a portion of said Group III metal contained in said coating, and frictionally contacting said oxidized Group III metal with pyrochlore-microlite mineral materials so as to at least form a complex with the oxide of the Group III metal. 2. A process according to claim 1 in which said Group III metal comprises aluminum. 3. A process according to claim 1 in which said Group III metal comprises at least one rare earth metal. 4. A process according to claim 1 in which said Group III metal comprises yttrium. 5. A process according to claim 1 in which said oxidation step comprises treating said Group III metal with a phosphorus containing acidic compound. 6. A process according to claim 1 in which said ferrous base metal article is steel. 7. A process according to claim 1 in which said ferrous base metal article is a ferrous base alloy. 8. A process according to claim 1 in which said ferrous base metal article is a weldable carbon steel. 9. The article produced in accordance with the process of claim 1. 10. The article produced in accordance with the process of claim 2. 11. The article produced in accordance with the process of claim 3. 12. The article produced in accordance with the process of claim 4. 13. The article produced in accordance with the process of claim 5. 14. The article produced in accordance with the process of claim 6. 15. The article produced in accordance with the process of claim 7. 16. In a process for providing a coating on ferrous base metal articles, the steps comprising: forming an adherent oxide layer on a surface of a ferrous base metal article, treating said oxide layer with at least one metal in solid form from Group III of the periodic table by frictional contacts so as to form a coating thereon, said Group III metal selected from the class consisting of aluminum, scandium, yttrium, and the rare earth metals, oxidizing at least a portion of the Group III metal contained in said coating, and treating said oxidized Group III metal layer with pyrochlore-microlite mineral materials so as to at least form a complex with the oxide of the Group III metal. 17. A process according to claim 16 in which said Group III metal comprises aluminum. 18. A process according to claim 16 in which said oxidizing step comprises treating said Group III metal with a phosphorus containing acidic compound.

Details for Patent 3,954,512

Applicant	Tradename	Biologic Ingredient	Dosage Form	BLA	Approval Date	Patent No.	Expiredate
Pharmalucence Inc	MICROLITE	radiolabeled albumin technetium tc-99m albumin colloid kit		018263	March 25, 1983		1994-12-13