Patents by Inventor Larry Roy Morris
Larry Roy Morris has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 6238686Abstract: Anti-microbial coatings and method of forming same on medical devices are provided. The coatings are formed by depositing a biocompatible metal by vapour deposition techniques to produce atomic disorder in the coating such that a sustained release of metal ions sufficient to produce an anti-microbial effect is achieved. Preferred deposition conditions to achieve atomic disorder include a lower than normal substrate temperature, and one or more of a higher than normal working gas pressure and lower than normal angle of incidence of coating flux. Anti-microbial powders formed by mechanical working to produce atomic disorder are also provided. The invention extends to other metal coating and powders similarly formed so as to provide enhanced solubility.Type: GrantFiled: June 25, 1997Date of Patent: May 29, 2001Assignee: Westaim TechnologiesInventors: Robert Edward Burrell, Larry Roy Morris
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Patent number: 6017553Abstract: Anti-microbial coatings and method of forming same on medical devices are provided. The coatings are preferably formed by depositing an anti-microbial, biocompatible metal by vapor deposition techniques to produce atomic disorder in the coating such that a sustained release of metal ions sufficient to produce an anti-microbial effect is achieved. Preferred deposition conditions to achieve atomic disorder include a lower than normal substrate temperature, and one or more of a higher than normal working gas pressure and a lower than normal angle of incidence of coating flux. Anti-microbial powders formed by vapor deposition or altered by mechanical working to produce atomic disorder are also provided. Novel anti-microbial silver materials are defined, characterized by having a positive rest potential, a T.sub.rec /T.sub.m less than 0.33, and a grain size less than 200 nm.Type: GrantFiled: June 2, 1995Date of Patent: January 25, 2000Assignee: Westaim Technologies, Inc.Inventors: Robert Edward Burrell, Larry Roy Morris, Prasad Shrikrishna Apte, Sudhindra Bharat Sant, Kashmir Singh Gill
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Patent number: 5985308Abstract: Production of an anti-microbial effect in an alcohol or water based electrolyte is achieved by preparing silver materials that form complex ions other than Ag.sup.+, Ag.sup.2+, or Ag.sup.3+, and which produce an anti-microbial effect that is greater than that produced by an equivalent amount of silver as Ag.sup.+. Exemplary complex silver ions produced include Ag(CN).sub.2.sup.-, AgCN(.sub.aq)(ion pair), Ag(NH.sub.3).sub.2.sup.+, AgCl.sub.2.sup.-, Ag(OH).sub.2.sup.-, Ag.sub.2 (OH).sub.3.sup.-, Ag.sub.3 (OH).sub.4.sup.-, and Ag(S.sub.2 O.sub.3).sub.2.sup.3-. The silver materials may be prepared as powders or as solutions or suspensions containing the complex silver ions. The silver materials might also be prepared as coatings, foils, powders, or fine grain or nanocrystalline powders, which are formed with atomic disorder to provide sustained release of the complex silver ions.Type: GrantFiled: February 2, 1994Date of Patent: November 16, 1999Assignee: Westaim Technologies, Inc.Inventors: Robert Edward Burrell, Prasad Shrikrishna Apte, Kashmir Singh Gill, Roderick John Precht, Larry Roy Morris
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Patent number: 5958440Abstract: Anti-microbial coatings and method of forming same on medical devices are provided. The coatings are preferably formed by depositing an anti-microbial, biocompatible metal by vapour deposition techniques to produce atomic disorder in the coating such that a sustained release of metal ions sufficient to produce an anti-microbial effect is achieved. Preferred deposition conditions to achieve atomic disorder include a lower than normal substrate temperature, and one or more of a higher than normal working gas pressure and a lower than normal angle of incidence of coating flux. Anti-microbial powders formed by vapour deposition or altered by mechanical working to produce atomic disorder are also provided. Novel anti-microbial silver materials are defined, characterized by having a positive rest potential, a T.sub.rec /T.sub.m less than 0.33, and a grain size less than 200 nm.Type: GrantFiled: November 18, 1993Date of Patent: September 28, 1999Assignee: Westaim Technologies, Inc.Inventors: Robert Edward Burrell, Larry Roy Morris, Prasad Shrikrishna Apte, Sudhindra Bharat Sant, Kashmir Singh Gill
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Patent number: 5874377Abstract: A microwave susceptor bed useful for sintering ceramics, ceramic composites and metal powders is disclosed. The susceptor bed contains granules of a major amount of a microwave susceptor material, and a minor amount of a refractory parting agent, either dispersed in the susceptor material, or as a coating on the susceptor material. Alumina is the preferred susceptor material. Carbon is the most preferred parting agent. A sintering process using the bed and novel silicon nitride products produced thereby are described.Type: GrantFiled: February 10, 1997Date of Patent: February 23, 1999Assignee: Microwear CorporationInventors: Prasad Shrikrishna Apte, Larry Roy Morris
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Patent number: 5837275Abstract: Anti-microbial coatings and method of forming same on medical devices are provided. The coatings are preferably formed by depositing an anti-microbial, biocompatible metal by vapor deposition techniques to produce atomic disorder in the coating such that a sustained release of metal ions sufficient to produce an anti-microbial effect is achieved. Preferred deposition conditions to achieve atomic disorder include a lower than normal substrate temperature, and one or more of a higher than normal working gas pressure and a lower than normal angle of incidence of coating flux. Anti-microbial powders formed by vapor deposition or altered by mechanical working to produce atomic disorder are also provided. Novel anti-microbial silver materials are defined, characterized by having a positive rest potential, a T.sub.rec /T.sub.m less than 0.33, and a grain size less than 200 nm.Type: GrantFiled: June 2, 1995Date of Patent: November 17, 1998Assignee: Westaim Technologies, Inc.Inventors: Robert Edward Burrell, Larry Roy Morris, Prasad Shrikrishna Apte, Sudhindra Bharat Sant, Kashmir Singh Gill
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Patent number: 5808282Abstract: A microwave susceptor bed useful for sintering ceramics, ceramic composites and metal powders is disclosed. The susceptor bed contains granules of a major amount of a microwave susceptor material, and a minor amount of a refractory parting agent, either dispersed in the susceptor material, or as a coating on the susceptor material. Alumina is the preferred susceptor material. Carbon is the most preferred parting agent. A sintering process using the bed and novel silicon nitride products produced thereby are described.Type: GrantFiled: April 28, 1997Date of Patent: September 15, 1998Assignee: Microwear CorporationInventors: Prasad Shrikrishna Apte, Larry Roy Morris
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Patent number: 5770255Abstract: Anti-microbial coatings and method of forming same on medical devices. The coatings are formed by depositing a biocompatible metal by physical vapor deposition techniques to produce atomic disorder in the coating such that a sustained release of metal ions sufficient to produce an anti-microbial effect is achieved. Preferred deposition conditions to achieve atomic disorder include a lower than normal substrate temperature, and one or more of a higher than normal working gas pressure and a lower than normal angle of incidence of coating flux.Type: GrantFiled: September 29, 1993Date of Patent: June 23, 1998Assignee: Westaim Technologies, Inc.Inventors: Robert E. Burrell, Larry Roy Morris
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Patent number: 5753251Abstract: Anti-microbial coatings and method of forming same on medical devices are provided. The coatings are formed by depositing a biocompatible metal by vapor deposition techniques to produce atomic disorder in the coating such that a sustained release of metal ions sufficient to produce an anti-microbial effect is achieved. Preferred deposition conditions to achieve atomic disorder include a lower than normal substrate temperature, and one or more of a higher than normal working gas pressure and a lower than normal angle of incidence of coating flux. Anti-microbial powders formed by mechanical working to produce atomic disorder are also provided. The invention extends to other metal coatings and powders similarly formed so as to provide enhanced solubility.Type: GrantFiled: June 2, 1995Date of Patent: May 19, 1998Assignee: Westaim Technologies, Inc.Inventors: Robert Edward Burrell, Larry Roy Morris
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Patent number: 5736092Abstract: A microwave susceptor bed useful for sintering ceramics, ceramic composites and metal powders is described. The susceptor bed includes granules of a major amount of a microwave susceptor material, and a minor amount of a refractory parting agent, either dispersed in the susceptor material, or as a coating on the susceptor material. Alumina is the preferred susceptor material. Carbon is the most preferred parting agent. Also described is a sintering process using the bed and to novel silicon nitride products produced thereby.Type: GrantFiled: June 17, 1996Date of Patent: April 7, 1998Assignee: Microwear CorporationInventors: Prasad Shrikrishna Apte, Larry Roy Morris
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Patent number: 5681575Abstract: Anti-microbial coatings and method of forming same on medical devices are provided. The coatings are formed by depositing a biocompatible metal by vapor deposition techniques to produce atomic disorder in the coating such that a sustained release of metal ions sufficient to produce an anti-microbial effect is achieved. Preferred deposition conditions to achieve atomic disorder include a lower than normal substrate temperature, and one or more of a higher than normal working gas pressure and a lower than normal angle of incidence of coating flux. Anti-microbial powders formed by mechanical working to produce atomic disorder are also provided. The invention extends to other metal coatings and powders similarly formed so as to provide enhanced solubility.Type: GrantFiled: May 7, 1993Date of Patent: October 28, 1997Assignee: Westaim Technologies Inc.Inventors: Robert Edward Burrell, Larry Roy Morris
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Patent number: 3989548Abstract: Dispersion strengthened aluminum alloy products are produced by working a cast aluminum alloy having a content of unaligned intermetallic rods in a selected size range to break up the brittle intermetallic rods. The intermetallic rods form 5.0 - 20 per cent by volume of the alloy and have an average diameter in the range of 0.1 - 1.5 (preferably 0.1 - 0.8) microns.The working required to effect the necessary segmentation of the rods and dispersion of the resultant intermetallic particles is sufficient to reduce the alloy by at least 60%. Initial hot working is preferably followed by cold working to effect at least a further 10% reduction of the hot worked alloy.The preferred alloys are alloys of Al-Fe-Mn and Al-Fe-Ni having a composition close to the eutectic and are cast under conditions to avoid as far as possible the formation of coarse primary intermetallic particles.Type: GrantFiled: May 17, 1974Date of Patent: November 2, 1976Assignee: Alcan Research and Development LimitedInventor: Larry Roy Morris