Patents by Inventor Steven D. Larsen
Steven D. Larsen 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: 11980911Abstract: A sprayer includes a spray gun and a hopper. An air source provides compressed air to the sprayer to both eject fluid from the spray gun as a spray and to pressurize the hopper. The spray gun includes passages for providing compressed air to the nozzle for spraying and to the hopper for pressurizing the hopper. The spray gun further includes a relief valve for venting pressurized air from the hopper. The hopper receives the compressed air through a port in the hopper, and the compressed air assists the flow of material out of the hopper and into the spray gun.Type: GrantFiled: March 23, 2023Date of Patent: May 14, 2024Assignee: Graco Minnesota Inc.Inventors: Steven D. Becker, David M. Larsen, Steve J. Wrobel, Mark D. Shultz, Robert J. Gundersen
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Patent number: 5938654Abstract: A dispenser for use in a fluid environment of use which is capable of the delivery of one or a plurality of discrete active agent-containing units in any desired delivery pattern or profile. It also can provide for the initially delayed delivery of an active agent to the environment of use and for high accuracy in the timing of delivery of the active agent.Type: GrantFiled: February 1, 1995Date of Patent: August 17, 1999Assignee: Alza CorporationInventors: Patrick S.-L. Wong, Felix Theeuwes, James B. Eckenhoff, Steven D. Larsen, Hoa T. Huynh
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Patent number: 5817335Abstract: The present invention is directed to a fluid-imbibing drug delivery device which is useful for the initial delayed delivery of an active agent formulation to a fluid environment of use, the initial delay period to startup or activation being of a predetermined length of time. The dispensing device is formed of a first and second housing that are in reversibly sliding telescoping arrangement with each other. The first housing contains the active agent formulation and has an aspect ratio less than 1. The housings are preferably. ovoloid in shape.Type: GrantFiled: May 26, 1995Date of Patent: October 6, 1998Assignee: ALZA CorporationInventors: Patrick S.-L. Wong, Liang C. Dong, Vincent J. Ferrari, Jeri D. Wright, Steven D. Larsen
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Patent number: 5531736Abstract: The present invention is directed to a fluid-imbibing dispensing device for the initially delayed delivery of an active agent to a fluid environment of use and to a method of using the dispensing device. The dispenser comprises a housing having a first wall section and a second wall section in reversibly sliding telescopic arrangement with each other, which housing maintains its integrity in the environment of use; an internal compartment surrounded and defined by the housing; at least one active agent formulation in the compartment; and expansion means and a push plate in the compartment for separating apart the first and second wall sections of the housing after exposure to the environment of use to expose the active agent formulation to the environment of use.Type: GrantFiled: April 19, 1995Date of Patent: July 2, 1996Assignee: Alza CorporationInventors: Patrick S.-L. Wong, Felix Theeuwes, Steven D. Larsen, Liang C. Dong
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Patent number: 5462741Abstract: A fluid-activated delivery device is disclosed comprising a housing defining an internal compartment, a beneficial agent formulation in the compartment, exit means in the housing for delivering the beneficial agent formulation from the delivery device, and wherein the formulation comprises an active agent in an amount of 50 wt % or greater blended with a glyceride or a mixture of glycerides of a fatty acid.Type: GrantFiled: April 28, 1994Date of Patent: October 31, 1995Assignee: Alza CorporationInventors: John P. Carr, Steven D. Larsen, James B. Eckenhoff
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Patent number: 5443459Abstract: The present invention is directed to a fluid-imbibing dispensing device for the initially delayed delivery of an active agent to a fluid environment of use and to a method of using the dispensing device. The dispenser comprises a housing having a first wall section and a second wall section in reversibly sliding telescopic arrangement with each other, which housing maintains its integrity in the environment of use; an internal compartment surrounded and defined by the housing; at least one active agent formulation in the compartment; and expansion means and a push plate in the compartment for separating apart the first and second wall sections of the housing after exposure to the environment of use to expose the active agent formulation to the environment of use.Type: GrantFiled: August 19, 1993Date of Patent: August 22, 1995Assignee: Alza CorporationInventors: Patrick S. L. Wong, Felix Theeuwes, Steven D. Larsen, Liang C. Dong
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Patent number: 5417682Abstract: The present invention is directed to a fluid-imbibing dispensing device for the immediate or almost immediate and extended delivery of an active agent over a prolonged period of time together with the initially delayed pulse delivery of an active agent to a fluid environment of use.Type: GrantFiled: January 21, 1994Date of Patent: May 23, 1995Assignee: Alza CorporationInventors: Patrick S. L. Wong, Felix Theeuwes, Steven D. Larsen, Liang C. Dong
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Patent number: 5391381Abstract: A dispenser for use in a fluid environment which is capable of delivery of a plurality of discrete drug-containing units in any desired delivery pattern or profile.Type: GrantFiled: May 11, 1993Date of Patent: February 21, 1995Assignee: ALZA CorporationInventors: Patrick S. L. Wong, Felix Theeuwes, James B. Eckenhoff, Steven D. Larsen, Hoa T. Huynh
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Patent number: 5340590Abstract: A dispenser for use in a fluid environment which is capable of delivery of a plurality of discrete drug-containing units in any desired delivery pattern or profile.Type: GrantFiled: July 8, 1993Date of Patent: August 23, 1994Assignee: Alza CorporationInventors: Patrick S. L. Wong, Felix Theeuwes, James B. Eckenhoff, Steven D. Larsen, Hoa T. Huynh
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Patent number: 5312388Abstract: The present invention is directed to a fluid-imbibing dispensing device for the immediate or almost immediate and extended delivery of an active agent over a prolonged period of time together with the initially delayed pulse delivery of an active agent to a fluid environment of use.Type: GrantFiled: January 31, 1992Date of Patent: May 17, 1994Inventors: Patrick S.-L. Wong, Felix Theeuwes, Steven D. Larsen
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Patent number: 5236689Abstract: A dispenser for use in a fluid environment which is capable of delivery of a plurality of discrete drug-containing units in any desired delivery pattern or profile.Type: GrantFiled: April 24, 1992Date of Patent: August 17, 1993Assignee: ALZA CorporationInventors: Patrick S. L. Wong, Felix Theeuwes, James B. Eckenhoff, Steven D. Larsen, Hoa T. Huynh
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Patent number: 5198229Abstract: The present invention is directed to a fluid-imbibing drug delivery device having a first, low density such that it floats in the stomach contents for a predetermined prolonged period of time, during which prolonged period of time it dispenses a drug or other active agent to the stomach, and having a second, higher density such that the device exits the stomach at the end of the predetermined prolonged period of time.Type: GrantFiled: June 5, 1991Date of Patent: March 30, 1993Assignee: ALZA CorporationInventors: Patrick S. L. Wong, Felix Theeuwes, Steven D. Larsen
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Patent number: 5110597Abstract: A dispenser for use in a fluid environment which is capable of delivery of a plurality of discrete drug-containing units in any desired delivery pattern or profile.Type: GrantFiled: May 17, 1991Date of Patent: May 5, 1992Assignee: ALZA CorporationInventors: Patrick S. L. Wong, Felix Theeuwes, James B. Eckenhoff, Steven D. Larsen, Hoa T. Huynh
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Patent number: 5023088Abstract: A dispenser for use in a fluid environment which is capable of delivery of a plurality of discrete drug-containing units in any desired delivery pattern or profile.Type: GrantFiled: March 19, 1990Date of Patent: June 11, 1991Assignee: Alza CorporationInventors: Patrick S. L. Wong, Felix Theeuwes, James B. Eckenhoff, Steven D. Larsen, Hoa T. Huynh
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Patent number: 4928410Abstract: A material handling apparatus connected to a prime mover having first and second jaws, the first jaw connected and configured to approximate a grading blade for a bulldozer, and the second jaw connected to the first jaw in one of two orientations, 180 degrees apart and about vertical axis. The jaws also have open and closed positions, defining four extreme positions. The combined first and second jaws define either a bucket, or when the second jaw is extended away from the grader blade a clam shell type bucket, or a pincer type grappler.Type: GrantFiled: June 17, 1987Date of Patent: May 29, 1990Inventors: Darrell L. Walters, Steven D. Larsen