Patents by Inventor Mark Rustad
Mark Rustad 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: 6775303Abstract: A communications device is presented that allows dynamic bandwidth allocation of an unswitched data path based upon the current utilization of one or more switched data channels. The device operates over the local loop of a digital communications carrier, such as a T1 line, that has a variety of time division multiplexed channels. Each data channel can be configured to operate as a channel dedicated to carrying unswitched data on the unswitched data path, or as a switched channel. Switched channels maintain status information about their current status, allowing switched data communication when the channel's status is active, and permitting the unswitched data path to utilize the channel when the channel's status is idle. In one embodiment, channel status information is passed to a remote unit by altering a redundant robbed-bit signaling bit in a multiframe. In a second embodiment, channel status is determined by monitoring switching information that is already transmitted about the channel.Type: GrantFiled: December 23, 1999Date of Patent: August 10, 2004Assignee: Digi International, Inc.Inventors: Mark Rustad, Terry A. Stripsky, Steve Wahl, Glenn A. Rogers
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Patent number: 6009106Abstract: A communications device is presented that allows dynamic bandwidth allocation of an unswitched data path based upon the current utilization of one or more switched data channels. The device operates over the local loop of a digital communications carrier, such as a T1 line, that has a variety of time division multiplexed channels. Each data channel can be configured to operate as a channel dedicated to carrying unswitched data on the unswitched data path, or as a switched channel. Switched channels maintain status information about their current status, allowing switched data communication when the channel's status is active, and permitting the unswitched data path to utilize the channel when the channel's status is idle. In one embodiment, channel status information is passed to a remote unit by altering a redundant robbed-bit signaling bit in a multiframe. In a second embodiment, channel status is determined by monitoring switching information that is already transmitted about the channel.Type: GrantFiled: November 19, 1997Date of Patent: December 28, 1999Assignee: Digi International, Inc.Inventors: Mark Rustad, Terry A. Stripsky, Steve Wahl, Glenn A. Rogers
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Patent number: 5103037Abstract: Novel compounds which are 2,6-di-t-butylphenols substituted in the 4 position by a carbamyl or acylamino group, which carbamyl or acylamino group is substituted by a group which includes an acidic substituent are useful as inhibitors of leukotriene biosynthesis and as antiallergic agents. Pharmacological methods for using such compounds and synthetic intermediates for preparing such compounds are also disclosed.Type: GrantFiled: May 13, 1991Date of Patent: April 7, 1992Assignee: Riker Laboratories, Inc.Inventors: Robert A. Scherrer, Mark A. Rustad
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Patent number: 5066822Abstract: Novel compounds which are 2,6-di-t-butylphenols substituted in the 4 position by an alkoxy or benzyloxy group or a benzylthio group, which alkoxy or benzyloxy group is directly substituted by a tetrazole ring, and which benzylthio group is directly substituted by carboxy or tetrazolyl are useful as inhibitors of leukotriene biosynthesis and as antiallergic agents. Synthetic intermediates for preparing such compounds are also described.Type: GrantFiled: June 29, 1990Date of Patent: November 19, 1991Assignee: Riker Laboratories, IncInventor: Mark A. Rustad
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Patent number: 5049572Abstract: Novel compounds which are 2,6-di-t-butylphenols substituted in the 4 position by a carbamyl or acylamino group, which carbamyl or acylamino group is substituted by a group which includes an acidic substituent are useful as inhibitors of leukotriene biosynthesis and as antiallergic agents. Pharmacological methods for using such compounds and synthetic intermediates for preparing such compounds are also disclosed.Type: GrantFiled: October 1, 1990Date of Patent: September 17, 1991Assignee: Riker Laboratories, Inc.Inventors: Robert A. Scherrer, Mark A. Rustad
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Patent number: 4973731Abstract: Novel compounds which are di-t-butylphenyl alkyl or benzyl ethers which alkyl or benzyl group is substituted by an acidic group are useful an antiallergic agents. Synthetic intermediates for making such compounds are also disclosed.Type: GrantFiled: April 23, 1987Date of Patent: November 27, 1990Assignee: Riker Laboratories, Inc.Inventor: Mark A. Rustad
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Patent number: 4968710Abstract: Novel compounds which are 2,6-di-t-butylphenols substituted in the 4 position by an alkoxy or benzyloxy group or a benzylthio group, which alkoxy or benzyloxy group is directly substituted by a tetrazole ring, and which benzylthio group is directly substituted by carboxy or tetrazolyl are useful as inhibitors of leukotriene biosynthesis and as antiallergic agents. Synthetic intermediates for preparing such compounds are also described.Type: GrantFiled: September 26, 1988Date of Patent: November 6, 1990Assignee: Riker Laboratories, Inc.Inventor: Mark A. Rustad
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Patent number: 4716178Abstract: Novel compounds which are 2,6-di-t-butylphenols substituted on the 4 position by an anilino group, which anilino group is substituted by a group which includes carboxyl, tetrazolyl or N-methyltetrazolyl are useful as inhibitors of leukotriene synthesis and as antiallergic agents. Pharmaceutical compositions containing such compounds and pharmacological methods for use of such compounds are also disclosed.Type: GrantFiled: August 27, 1986Date of Patent: December 29, 1987Assignee: Riker Laboratories, Inc.Inventors: Robert A. Scherrer, Mark A. Rustad
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Patent number: 4275221Abstract: Compounds wherein 2-nitrobenzofuran is substituted by one or two phenyl groups and certain other substituents which are active as antimicrobial agents, processes for their use and intermediates therefor.Type: GrantFiled: January 21, 1980Date of Patent: June 23, 1981Assignee: Riker Laboratories, Inc.Inventors: Walton J. Hammar, Mark A. Rustad
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Patent number: 4258213Abstract: Compounds wherein 2-nitrobenzofuran is substituted by one or two phenyl groups and certain other substituents which are active as antimicrobial agents, processes for their use and intermediates therefor.Type: GrantFiled: January 21, 1980Date of Patent: March 24, 1981Assignee: Riker Laboratories, Inc.Inventors: Walton J. Hammar, Mark A. Rustad
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Patent number: 4247469Abstract: Compounds wherein 2-nitrobenzofuran is substituted by one or two phenyl groups and certain other substituents which are active as antimicrobial agents, a processes for their use and intermediates therefor.Type: GrantFiled: January 21, 1980Date of Patent: January 27, 1981Assignee: Riker Laboratories, Inc.Inventors: Walton J. Hammar, Mark A. Rustad
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Patent number: 4246179Abstract: Compounds wherein 2-nitrobenzofuran is substituted by one or two phenyl groups and certain other substituents which are active as antimicrobial agents, processes for their use and intermediates therefor.Type: GrantFiled: January 21, 1980Date of Patent: January 20, 1981Assignee: Riker Laboratories, Inc.Inventors: Walton J. Hammar, Mark A. Rustad
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Patent number: 4208337Abstract: Compounds wherein 2-nitrobenzofuran is substituted by one or two phenyl groups and certain other substituents which are active as antimicrobial agents, processes for their use and intermediates therefor.Type: GrantFiled: February 21, 1979Date of Patent: June 17, 1980Assignee: Riker Laboratories, Inc.Inventors: Walton J. Hammar, Mark A. Rustad
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Patent number: 4172205Abstract: Compounds wherein a phenylalkanoic acid is substituted by a 2-nitro-3-phenylbenzofuran group which are active as antimicrobial agents, processes for their use and intermediates therefor are described.Type: GrantFiled: December 20, 1978Date of Patent: October 23, 1979Assignee: Riker Laboratories, Inc.Inventors: Walton J. Hammar, Mark A. Rustad
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Patent number: 4153721Abstract: Compounds wherein 2-nitrobenzofuran is substituted by one or two phenyl groups and certain other substituents which are active as antimicrobial agents, processes for their use and intermediates therefor.Type: GrantFiled: December 19, 1977Date of Patent: May 8, 1979Assignee: Riker Laboratories, Inc.Inventors: Walton J. Hammar, Mark A. Rustad
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Patent number: 4143152Abstract: Compounds wherein a phenylalkanoic acid is substituted by a 2-nitro-3-phenylbenzofuran group which are active as antimicrobial agents, processes for their use and intermediates therefor are described.Type: GrantFiled: December 19, 1977Date of Patent: March 6, 1979Assignee: Riker Laboratories, Inc.Inventors: Walton J. Hammar, Mark A. Rustad