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| Number | Title | Issue Date |
| 6604257 | Apparatus and method for cleaning a conduit The present invention discloses an apparatus and method for cleaning an exhaust conduit that has chemical substances deposited on its inside wall by utilizing a shaft that has a plurality of scraping elements mounted thereto capable of making vertically o... | 08/12/2003 |
| 6544482 | Chamber cleaning mechanism The present invention provides a reaction chamber cleaning apparatus comprising a chamber, a blade apparatus comprising at least one annular mounting member, at least four scraping blades attached peripherally about the annular mounting member, and a reci... | 04/08/2003 |
| 6182325 | Chamber cleaning mechanism An apparatus for cleaning a chamber is disclosed. Scraping blades are rotatably mounted within a chamber and parallel to a longitudinal axis of the chamber. The scraping blades are rotated circumferentially within the chamber, scraping the inner surface o... | 02/06/2001 |
| 5697839 | Ventilation hood for wet-clean process chamber An apparatus for venting hazardous effluents from process equipment used in the manufacture of semiconductors, which is part of a larger ventilating system, is a "see-thru" transparent chamber which performs the function of a hood, and can be mounted on a... | 12/16/1997 |
| 5333349 | Apparatus for patching a break in the sidewall of a chimney Patching grout is forced into a break in the sidewall of a chimney by having the repairing person deposit a quantity of grout on the upper side of a trowel and move the trowel into a position immediately below the break. The trowel is pivot-ably mounted o... | 08/02/1994 |
