Method for production of three-dimensional objects by stereolithography
Patent 4929402 Issued on May 29, 1990. Estimated Expiration Date: 
April 19, 2009. 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 19, 2009. 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 ReferencesInventorAssigneeApplicationNo. 340894 filed on 04/19/1989US Classes:264/401, STEREOLITHOGRAPHIC SHAPING FROM LIQUID PRECURSOR264/308, Incremental layer molding type365/106, RADIANT ENERGY425/174.4, Radiated energy427/498, Immersion, partial immersion, spraying, or spin coating utilized (e.g., dipping, etc.)427/512, Immersion, partial immersion, spraying, or spin coating utilized (e.g., dipping, etc.)427/532, Pretreatment of substrate or post-treatment of coated substrate427/533, Ionized gas utilized (e.g., electrically powered source, corona discharge, plasma, glow discharge, etc.)427/540, Arc or electrical discharge427/551, High energy electromagnetic radiation or high energy particles utilized (e.g., gamma ray, X-ray, atomic particle, i.e., alpha ray, beta ray, high energy electron, etc.)427/553, Low energy electromagnetic radiation (e.g., microwave, radio wave, IR, UV, visible, actinic, laser, etc.)427/554LaserExaminersPrimary: Silbaugh, Jan H.Assistant: Fertig, Mary Lynn Attorney, Agent or FirmForeign Patent References
International ClassesG03B 035/00B29C 067/24 AbstractA system for generating three-dimensional objects by creating a cross-sectional pattern of the object to be formed at a selected surface of a fluid medium capable of altering its physical state in response to appropriate synergistic stimulation by impinging radiation, particle bombardment or chemical reaction, successive adjacent laminae, representing corresponding successive adjacent cross-sections of the object, being automatically formed and integrated together to provide a step-wise laminar buildup of the desired object, whereby a three-dimensional object is formed and drawn from a substantially planar surface of the fluid medium during the forming process.Other References
Field of SearchWITH MEASURING, TESTING, OR INSPECTINGBy separately molding different article portions Sequential formation of portion on same mold or a preform surface By casting on a liquid surface Incremental layer molding type RADIANT ENERGY Chemical fluids Color centers INFORMATION MASKING Transparency Contour or profile photography to reproduce three-dimensional objects Before final assembly; e.g., to cure lamina, etc. Before and after final assembly To polymerize or cure material in work Radiated energy | |
