Method of making an article

Details Method of making an article Method of making an article

Filed on

2008-10-17

Date issued

2010-12-21

Examiner

Ward, Jessica L (Department: 1735)

Patent Class

Powder metallurgy processes

SubClass

Powder metallurgy processes with heating or sintering

SubSubClass

Making composite or hollow article

Type

Reexamination Certificate

Status

active

Patent number

07854885

Description

ABSTRACT:
A method of making an article having at least one re-entrance surface includes the steps of (a) forming a layer of metal powder on a base, (b) selectively laser fusing portions of the layer, and (c) repeating steps (a) and (b) to form the article, each step (a) being performed on the preceding layer characterised in that prior to performing step (a) in a layer which will initiate the formation of a re-entrant feature reversibly bonding at least some of the unfused underlying powder such that it is stable under the application of the laser.

REFERENCES:
patent: 5555481 (1996-09-01), Rock et al.
patent: 6589471 (2003-07-01), Khoshnevis
patent: 2004/0018107 (2004-01-01), Khoshnevis
patent: 2004/0137228 (2004-07-01), Monsheimer et al.
patent: 1 775 104 (2007-04-01), None
patent: 01/38061 (2001-05-01), None
patent: 2004/058487 (2004-07-01), None

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