Foamed lightweight ceramic compositions
Patent 3944425 Issued on March 16, 1976. Estimated Expiration Date: 
March 16, 1993. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
March 16, 1993. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 2081802 3232772 3729328 InventorAssigneeApplicationNo. 438442 filed on 01/31/1974US Classes:501/84, By gas blowing, foaming agent, or in situ reactive gas generation106/681Soil, diatomaceous earth, clay, shale, slate or rock material containing or material for treating soil or earth (e.g., soil stabilization, etc.)ExaminersPrimary: Poer, J.Attorney, Agent or FirmAbstractThis invention provides cellular clay compositions which are dimensionally stable at 1000°F. and higher, and which have a controlled pore structure that enhances the strength, durability and insulating properties of the compositions. | |
