Process for the preparation of expansible beads
Patent 4059423 Issued on November 22, 1977. Estimated Expiration Date: 
November 22, 1994. 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.
November 22, 1994. 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 2978339 2978340 3458332 3532480 3699050 InventorsAssigneeApplicationNo. 05/701966 filed on 07/01/1976US Classes:65/21.2, By molten glass comminuting106/605, Hollow, foam, cellular or porous materials containing264/15, SPHEROIDIZING OR ROUNDING OF SOLID PARTICLES264/43, Including vitrification or firing501/39, Pore-forming501/65, And boron65/22With pore forming in situExaminersPrimary: Lindsay, Robert L.Attorney, Agent or FirmForeign Application Priority Data1975-07-17 UKAbstractA process for the preparation of expansible beads which are convertible by firing into cellular glass bodies, such process comprising the steps of preparing a slip having a liquid medium continuous phase and a disperse phase, the slip containing particles of glass or glass-forming material, a cellulating agent, and a binder, the disperse phase of the slip including at least most of the particles, dividing the slip into drops, and subjecting the drops while in divided condition to a heat treatment including heating and cooling stages so as to cause evaporation of liquid from the drops and conversion thereof into self-sustaining beads in which the glass or glass-forming particles are held together by the binder and which contain the cellulating agent or gas derived therefrom. | |
