Patents by Inventor Roberta L. Farrell
Roberta L. Farrell 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: 5998197Abstract: Ascospores of wood-penetrating, pitch-grading fungi of the class of Ascomycotina and Deuteromycotina, eg. Ophiostromas, may be screened to provide fungi combining the properties of good growth on non-sterile wood substrates and minimized or even enhanced brightness effects for use in pitch reduction of wood substrates, eg. logs and wood chips. A new and improved method of isolating such ascospores involving effective suspension in an oil consumable by the fungus, eg. a vegetable oil, and then treatment of the oil with a dispersing agent is also disclosed.Type: GrantFiled: June 6, 1995Date of Patent: December 7, 1999Assignee: Clariant Finance (BVI) LimitedInventors: Roberta L. Farrell, Yitzhak Hadar, Philip A. Wendler, Wendy Zimmerman
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Patent number: 5853537Abstract: Wood-penetrating fungi of the classes Ascomycotina and Deuteromycotina may be used very effectively to degrade pitch in wood forms used in the making of cellulosic products. Such fungi include but are not limited to the blue stain fungi. The process of Ascospore selection may be used to provide fungi which exhibit good growth on wood substrate while having little or no effects on substrate brightness, or even a positive effect on brightness. The treatment positively influences strength properties of ultimate products such as paper. In one embodiment the pulpwood or pulp is treated with a pitch degrading fungus of the genus Ophiostoma.Type: GrantFiled: June 5, 1995Date of Patent: December 29, 1998Assignee: Clariant Finance (BVI) LimitedInventors: Robert A. Blanchette, Roberta L. Farrell, Yitzhak Hadar, Johnnie E. Merritt, II, Robert A. Snyder, Philip A. Wendler, Wendy Zimmerman
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Patent number: 5766926Abstract: The bacteria Pseudomonas fluorescens, Pantoea (Enterobacter) agglomerans, Bacillus cereus, and Xanthomonas campestris are useful in reducing the pitch content of pulps and pulpwoods used in making cellulosic products. Such bacteria are also useful in reducing the color staining by staining fungi of structural wood by inoculating the structural wood or log sources from which it is to be cut.Type: GrantFiled: May 8, 1996Date of Patent: June 16, 1998Assignee: Clariant Finance (BVI) LimitedInventors: Robert A. Blanchette, Todd A. Burnes, Roberta L. Farrell, Sara Iverson
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Patent number: 5711945Abstract: The bacteria Pseudomonas fluorescens and Xanthomonas campestris are useful in reducing the pitch content of pulps and pulpwoods used in making cellulosic products. Such bacteria are also useful in reducing the color staining by staining fungi of structural wood by inoculating the structural wood or log sources from which it is to be cut.Type: GrantFiled: May 11, 1995Date of Patent: January 27, 1998Assignee: Regents of the University of MinnesotaInventors: Robert A. Blanchette, Todd A. Burnes, Roberta L. Farrell
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Patent number: 5616473Abstract: The gene encoding the ligninase rLDM.TM. 6 has been cloned and expressed. The ligninases produced via the processes disclosed herein are useful to degrade or modify lignin in pulp operations.Type: GrantFiled: August 8, 1994Date of Patent: April 1, 1997Assignee: Clariant Finance (BVI) LimitedInventors: Roberta L. Farrell, Paul Gelep, Algis Anilionis, Kashayar Javaherian, Theodore E. Maione, James Rusche, Bruce A. Sadownick, Jennifer A. Jackson
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Patent number: 5609724Abstract: Ascospores of wood-penetrating, pitch-grading fungi of the class of Ascomycotina and Deuteromycotina, eg. Ophiostromas, may be screened to provide fungi combining the properties of good growth on non-sterile wood substrates and minimized or even enhanced brightness effects for use in pitch reduction of wood substrates, eg. logs and wood chips. A new and improved method of isolating such ascospores involving effective suspension in an oil consumable by the fungus, eg. a vegetable oil, and then treatment of the oil with a dispersing agent is also disclosed.Type: GrantFiled: June 6, 1995Date of Patent: March 11, 1997Assignee: Sandoz LtdInventors: Roberta L. Farrell, Yitzhak Hadar, Philip A. Wendler, Wendy Zimmerman
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Patent number: 5607855Abstract: This invention relates to fungi having particularly desirable overall properties for reducing the pitch content of pulpwoods and pulps, and to the preparation and use of such fungi. In particular, the present invention provides a biologically pure cultures of the fungus Ophiostoma piliferum which are characterized by not only growing white or colorless and by having good growth virulence, but which also exhibit exceptional pitch degradation properties.Type: GrantFiled: June 28, 1994Date of Patent: March 4, 1997Assignee: Sandoz Ltd.Inventors: Wendy C. Zimmerman, Roberta L. Farrell
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Patent number: 5554535Abstract: The white rot fungus Scytinostroma galactinum strain F361 and mutants thereof are particularly effective in selectively grading the lignin component of lignin-containing materials, particularly processed wood pulps including chemical pulps, and also particularly effective in degrading lignin degradation products such as chlorinated degraded lignin by-products as found, for example, in E-1 effluents, and also in degrading chlorine-containing aromatic compounds generally as found in aqueous waste streams containing the same.Type: GrantFiled: October 28, 1994Date of Patent: September 10, 1996Assignee: Clariant Finance (BVI) LimitedInventors: Robert A. Blanchette, Theresa S. Brush, Roberta L. Farrell, Keith A. Krisa, Chittra Mishra
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Patent number: 5545544Abstract: The white rot fungus Scytinostroma galactinum strain F361 and mutants thereof are particularly effective in selectively grading the lignin component of lignin-containing materials, particularly processed wood pulps including chemical pulps, and also particularly effective in degrading lignin degradation products such as chlorinated degraded lignin by-products as found, for example, in E-1 effluents, and also in degrading chlorine-containing aromatic compounds generally as found in aqueous waste streams containing the same.Type: GrantFiled: June 6, 1995Date of Patent: August 13, 1996Assignees: Sandoz Ltd., The Regents of the Univ. of MinnesotaInventors: Robert A. Blanchette, Theresa S. Brush, Roberta L. Farrell, Keith A. Krisa, Chittra Mishra
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Patent number: 5538752Abstract: Compositions comprising melanin or melanin precursors are useful for preventing or controlling decay of substrates such as cellulosic and other porous organic substrates. The compositions provide useful wood preservatives, wound dressings, and the like. In one embodiment, the compositions comprise melanin complexed with metal ions, particularly copper. The compositions may be applied as penetrating or surface treatments. Certain melanins are also particularly useful for removing metal ions from liquids.Type: GrantFiled: February 13, 1995Date of Patent: July 23, 1996Assignees: Regents of the Univ. of Minnesota, Sandoz Ltd.Inventors: Robert A. Blanchette, Theresa S. Brush, Roberta L. Farrell
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Patent number: 5532164Abstract: Fungi which grow white/colorless and reduce pitch are used to protect structural wood before or after cutting from logs against color staining by staining fungi.Type: GrantFiled: May 20, 1994Date of Patent: July 2, 1996Assignee: Sandoz Ltd.Inventors: Robert A. Blanchette, Roberta L. Farrell, Chad J. Behrendt
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Patent number: 5518921Abstract: Fungi which grow white/colorless and reduce pitch are used to protect structural wood before or after cutting from logs against color staining by staining fungi. The fungus Phanerochaete gigantea is also useful to facilitate debarking.Type: GrantFiled: April 17, 1995Date of Patent: May 21, 1996Assignee: Clariant Finance (BVI) LimitedInventors: Robert A. Blanchette, Roberta L. Farrell, Chad J. Behrendt
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Patent number: 5476789Abstract: Ascospores of wood-penetrating, pitch-grading fungi of the class of Ascomycotina and Deuteromycotina, e.g. Ophiostromas, may be screened to provide fungi combining the properties of good growth on non-sterile wood substrates and minimized or even enhanced brightness effects for use in pitch reduction of wood substrates, e.g. logs and wood chips. A new and improved method of isolating such ascospores involving effective suspension in an oil consumable by the fungus, e.g. a vegetable oil, and then treatment of the oil with a dispersing agent is also disclosed.Type: GrantFiled: October 1, 1993Date of Patent: December 19, 1995Assignee: Sandoz Ltd.Inventors: Roberta L. Farrell, Yitzhak Hadar, Philip A. Wendler, Wendy Zimmerman
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Patent number: 5476790Abstract: The fungi Schizophyllum commune, Trichaptum biforme and Phanerochaete gigantea are useful in reducing the pitch content of pulps and pulpwoods used in making cellulosic products.Type: GrantFiled: November 3, 1994Date of Patent: December 19, 1995Assignee: Sandoz Ltd.Inventors: Robert A. Blanchette, Roberta L. Farrell, Sara Iverson
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Patent number: 5472874Abstract: The fungus Phlebia tremellosa is useful in reducing the pitch content of pulps and pulpwoods used in making cellulosic products.Type: GrantFiled: May 20, 1994Date of Patent: December 5, 1995Assignee: Sandoz Ltd.Inventors: Robert A. Blanchette, Roberta L. Farrell, Sara Iverson
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Patent number: 5427945Abstract: The white rot fungus Scytinostroma galactinum strain F361 and mutants thereof are particularly effective in selectively grading the lignin component of lignin-containing materials, particularly processed wood pulps including chemical pulps, and also particularly effective in degrading lignin degradation products such as chlorinated degraded lignin by-products as found, for example, in E-1 effluents, and also in degrading chlorine-containing aromatic compounds generally as found in aqueous waste streams containing the same.Type: GrantFiled: February 18, 1994Date of Patent: June 27, 1995Assignees: Sandoz Ltd., The Regents of the Univ. of MinnesotaInventors: Robert A. Blanchette, Theresa S. Brush, Roberta L. Farrell, Keith A. Krisa, Chittra Mishra
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Patent number: 5077394Abstract: Disclosed are tetraphenyl porphyrins which are beta-substituted by fluoro or chloro and/or bear electronegative substituents on the phenyl including one or two water solubilizing substituents. The new porphorins are particularly suitable as catalysts in a variety of oxidative reactions and methods.Type: GrantFiled: December 21, 1989Date of Patent: December 31, 1991Assignee: Sandoz Ltd.Inventors: David H. Dolphin, Taku Nakano, Thomas K. Kirk, Tilak P. Wijesekera, Roberta L. Farrell, Theodore E. Maione
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Patent number: 4892941Abstract: Disclosed are tetraphenyl porphyrins which are beta-substituted by fluoro or chloro and/or bear electronegative substituents on the phenyl including one or two water solubilizing substituents. The new porphorins are particularly suitable as catalysts in a variety of oxidative reactions and methods.Type: GrantFiled: April 15, 1988Date of Patent: January 9, 1990Inventors: David H. Dolphin, Taku Nakano, Thomas K. Kirk, Tilak P. Wijesekera, Roberta L. Farrell, Theodore E. Maione
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Patent number: 4692413Abstract: Disclosed is a novel process for decolorization of E1 effluent. Specifically, novel enzymes, designated rLDM.TM., and other ligninolytic enzymes present in the extracellular growth medium from a fermentation of Phanerochaete chrysosporium, are used to decolorize the effluent.Type: GrantFiled: March 28, 1986Date of Patent: September 8, 1987Assignee: Repligen CorporationInventor: Roberta L. Farrell
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Patent number: 4690895Abstract: The subject invention concerns a novel enzymatic process for bleaching kraft pulp. Specifically, novel enzymes, designated rLDM.TM., and other ligninolytic enzymes present in the extracellular growth medium from a fermentation of Phanerochaete chrysosporium, are used to bleach kraft pulp to a desired lighter color.Type: GrantFiled: March 28, 1986Date of Patent: September 1, 1987Assignee: Repligen CorporationInventor: Roberta L. Farrell