Molded polymeric foam preparation method
Patent 5700407 Issued on December 23, 1997. Estimated Expiration Date: 
April 29, 2016. 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.
April 29, 2016. 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 3160689 3389198 3642965 3812225 Method and apparatus for injection molding foamed plastic articles using a pre-pressurized mold having fixed core members with controlled venting Method and apparatus for generating foamed thermoplastic materials Process and apparatus for injection moulding and mouldings produced thereby Method of forming an article consisting of a foam core and one or more covering layers Patent #: 5374383 InventorApplicationNo. 639717 filed on 04/29/1996US Classes:264/54, Chemical blowing264/52, Utilizing expansion retarder264/500DIRECT APPLICATION OF FLUID PRESSURE DIFFERENTIAL TO PERMANENTLY SHAPE, DISTORT, OR SUSTAIN WORKExaminersPrimary: Kuhns, Allan R.Attorney, Agent or FirmForeign Patent References
International ClassB29C 044/10AbstractFoamed articles having excellent properties are prepared by partially filling a mold with foamable composition, pressurizing the mold while heating to activate blowing agent and crosslinking agent, and releasing the pressure while the polymer is at least partially crosslinked to permit the foam to fill the mold. | |
