Patents Examined by Jennifer Calcagni
  • Patent number: 6004632
    Abstract: A method for depositing a silicon oxynitride layer that has a higher etch-removal rate. The deposition starts by first passing gas from a pipeline A into the deposition chamber before switching the RF power source on. The further is the delay in switching the RF power source on, the higher will be the etch-removal rate of the silicon oxynitride layer formed by the deposition. Furthermore, the RF power source will remain on for a short period after the pump starts pumping gas away from the deposition chamber through pipeline A at the end of the deposition. The sooner is the switching off of the RB power source after the pump start to operate, the higher will be the etch-removal rate of the silicon oxynitride layer that result from the deposition.
    Type: Grant
    Filed: December 17, 1997
    Date of Patent: December 21, 1999
    Assignee: United Microelectronics Corp.
    Inventors: Shih-Ying Hsu, Chih-Hsiang Hsiao, Heng-Sheng Huang
  • Patent number: 5997647
    Abstract: A line marking apparatus adapted in use to be advanced relative to a ground surface in a line marking direction includes a discharge opening region formed between first and second side members for discharge of line marking material therebetween onto the ground surface. The side members extend substantially parallel to the line marking direction and adjusting means is provided for moving the first and second side members towards and away from each other so as to adjust the width of a line to be marked by the apparatus. The adjusting means comprises interconnected pivotable arms, at least one of the side members being supported on the pivotable arms such that relative pivoting of the arms causes the at least one of the side members to move towards and away from the other thereof.
    Type: Grant
    Filed: April 30, 1998
    Date of Patent: December 7, 1999
    Inventor: Iain Peter McGuffie
  • Patent number: 5993913
    Abstract: The detrimental effects of fluctuating humidity are neutralized by adjusting the viscosity of a waterborne coating as it is being conducted to the spraying device. A predetermined amount of water or other viscosity modifying additive is mixed continuously with the coating in the coating supply line immediately upstream from the spray device. The amount of water or other additive to be added may be determined by monitoring the humidity in the spray zone. Preferably, an automated feedback control system is employed to adjust the amount of water or other viscosity altering additive being mixed into the coating stream.
    Type: Grant
    Filed: March 24, 1998
    Date of Patent: November 30, 1999
    Assignee: PPG Industries Ohio, Inc.
    Inventors: Mary Ellen Rosenberger, Donald B. Jones
  • Patent number: 5993914
    Abstract: The present invention is directed to a defect-free magnetic memory disc substrate. In particular, it is directed to a composite alumina-based, glass-coated, article with a defect free surface. Several methods for its manufacture including frit bonding, molten glass submersion, and tape formation are disclosed.
    Type: Grant
    Filed: July 31, 1998
    Date of Patent: November 30, 1999
    Assignee: Corning Incorporated
    Inventors: K. Pattabhirami Reddy, Timothy A. Roe
  • Patent number: 5989644
    Abstract: A spray painting apparatus and methodology. A plurality of parts are loaded onto a carrier at circumferentially spaced locations about a central spin axis of the carrier whereafter the carrier is moved in indexing fashion to a spray station where drive means engage the carrier to spin the carrier about its spin axis while a spray gun assembly is moved up and down in reciprocal fashion parallel to the spin axis. The parts are mounted on the carrier in a fashion to simulate impellers which have the effect of sucking air into the center region of the carrier to augment painting of the interior surfaces of the parts. The carriers are preferably moved to the paint spray station by a power and free conveyor system wherein the carrier is disengaged from the power conveyor at the paint spray station and is reengaged with the power conveyor following spinning movement of the carrier and reciprocal movement of the spray gun assembly.
    Type: Grant
    Filed: June 12, 1998
    Date of Patent: November 23, 1999
    Assignee: Adac Plastics, Inc.
    Inventor: Terry L. Williams
  • Patent number: 5989646
    Abstract: Ropes made of plastic filaments are used extensively for fishing equipment such as nets and trawl bags, and it has been found that a wax impregnation of the ropes is advantageous in several respects. However, the presence of free wax on the rope surface is undesirable, and according to the invention this is avoided by moving the rope through an impregnation unit (1) comprising a warm wax bath, in such a controlled manner that the rope is only partially saturated, whereafter the rope is air heated at a temperature higher than the melting point of the wax in order for the free surface wax to penetrate into the rope surface.
    Type: Grant
    Filed: July 16, 1998
    Date of Patent: November 23, 1999
    Assignee: A/S N.P. Utzon
    Inventor: Stig Brog.ang.rd Andersen
  • Patent number: 5985366
    Abstract: Improved sprayable roof coating systems which provide immediate waterproofing of a newly-sprayed latex-based ionic roof coating by applying to the upper surface of such roof coating an ionic catalyst having a pH opposed to the pH of such roof coating, whereby such upper surface of such roof coating coagulates immediately to form a thin waterproof surface layer on such roof coating and the bottom portions of such roof coating are permitted to coagulate and bond to the underlying roof normally. Also, latex-based sprayable roof coating systems permitting use in roof mastics of recycled rubber and spray equipment for such systems which do not clog up when air spraying such recycled-rubber-containing roof mastics.
    Type: Grant
    Filed: October 14, 1997
    Date of Patent: November 16, 1999
    Inventor: Winfield S. Wright
  • Patent number: 5968601
    Abstract: There is claimed a method for depositing fluid material from a linear nozzle in a substantially uniform manner across and along a surface. The method includes directing gaseous medium through said nozzle to provide a gaseous stream at the nozzle exit that entrains fluid material supplied to the nozzle, said gaseous stream being provided with a velocity profile across the nozzle width that compensates for the gaseous medium's tendency to assume an axisymmetric configuration after leaving the nozzle and before reaching the surface. There is also claimed a nozzle divided into respective side-by-side zones, or preferably chambers, through which a gaseous stream can be delivered in various velocity profiles across the width of said nozzle to compensate for the tendency of this gaseous medium to assume an axisymmetric configuration.
    Type: Grant
    Filed: August 20, 1997
    Date of Patent: October 19, 1999
    Assignee: Aluminum Company of America
    Inventors: David D. Leon, Robert L. Kozarek, Adel Mansour, Norman Chigier
  • Patent number: 5955145
    Abstract: A process for forming a coated article having a wear resistant coating that minimizes the generation and effects of wear debris is provided. Three independent mechanisms are operative: hard crystalline debris are avoided by specifying that all coating phases harder than 1000 VHN be amorphous, large wear debris from the coating are avoided by including finely dispersed porosity in the coating, and debris in the wear area is removed by a textured surface on some portion of the coating. The process for applying the coating need not use materials that are extremely hazardous to man and the environment.
    Type: Grant
    Filed: July 2, 1998
    Date of Patent: September 21, 1999
    Assignee: Analytical Services & Materials, Inc.
    Inventors: Prasad Rao Kalvala, Durga Prasad Beesabathina, Karl Erik Wiedemann
  • Patent number: 5955146
    Abstract: A process for coating the surface of a single crystal with a magnesium oxide film which comprises contacting an organomagnesium compound having an oxygen to magnesium atomic ratio of 1:1 with the crystal heated to a temperature ranging from 300.degree. C. to 450.degree. C. in the absence of oxygen. The magnesium oxide film thus produced has a negligible amount of residual carbon.
    Type: Grant
    Filed: December 18, 1997
    Date of Patent: September 21, 1999
    Assignee: Korea Research Institute of Chemical Technology
    Inventors: Yunsoo Kim, Wonyong Koh, Sujin Ku
  • Patent number: 5935658
    Abstract: The invention relates to a process for application of an organic coating on a moving metallurgical product 7 from a bath of a liquid organic material 3 contained in a vat 2 and liable to comprise air bubbles, the transfer of said liquid organic material 3 onto the product being accomplished in a coating zone, characterized in that, in order to eliminate said air bubbles, there is created in at least one zone of the bath, located upstream from said coating zone, an ascending current in the liquid material so as to convey the air bubbles from the bath to the vicinity of its surface and cause their bursting. The invention also relates to an apparatus for the implementation of this process.
    Type: Grant
    Filed: November 13, 1997
    Date of Patent: August 10, 1999
    Assignee: Sollac
    Inventor: Denis Clerc
  • Patent number: 5925402
    Abstract: As a means of providing a patterned coating on a substrate, either decorative or functional, coating powder is applied to a substrate. Then the coating powder is fused or fused and cured in selected portions by computer-guided laser. One application of the invention is to fuse coating powder into a resist pattern for the production of printed circuitry.
    Type: Grant
    Filed: July 15, 1998
    Date of Patent: July 20, 1999
    Assignee: Morton International, Inc.
    Inventors: Wayne E. Nacker, Robert M. Didrick