Patents by Inventor Daniel Rittschof
Daniel Rittschof 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: 9938415Abstract: The present invention relates to derivatives of ?, ?-disubstituted amide compounds which comprise a substituted aryl at the ? carbon such that the substituent provides a means for attachment or incorporation of the compound to or in a polymer. The provision of such a substituent on the aryl has surprisingly been found not only to permit attachment to or incorporation n a polymer but also retention of useful antifouling activity. In embodiments, the substituent is selected from hydroxyl, ethers, esters, carboxyls, alkylsilyls and alkenyls. Experiments demonstrate that antifouling activity can be as good or better as the corresponding unsubstituted compound and that polymers functionalized so as to include or be formed from the substituted compound can be used to reduce settlement.Type: GrantFiled: September 21, 2015Date of Patent: April 10, 2018Assignees: Agency for Science, Technology and Research, National University of Singapore, Maritime and Port Authority of SingaporeInventors: Christina Li Lin Chai, Brendan Adrian Burkett, Serena Lay Ming Teo, Daniel Rittschof, Serina Siew Chen Lee, Gary Howard Dickinson, Han Hong
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Publication number: 20160311788Abstract: The present invention relates to the use of compounds which have the following general formula (I): wherein R1 and R2 are independently selected from optionally substituted aryl, optionally substituted C1 to C12 alkyl and H; and R3 and R4 are independently selected from hydroxy, optionally substituted C1 to C6 alkyl, optionally substituted phenyl and H, in a method of preventing or reducing fouling, particularly in the marine environment. The compounds of the present invention have the considerable advantage of providing the antifouling coating market with an organic alternative to the existing technology which relies heavily on the addition of copper to obtain significant antifouling effects. The compounds we have developed may be used as cheap, easy to prepare additives that do not contain metals and therefore have reduced toxicity in marine environment.Type: ApplicationFiled: July 7, 2016Publication date: October 27, 2016Inventors: Lay Ming Serena Teo, Daniel Rittschof, Felicity Jameson, Christina Chai, Chia Lung Chen, Siew Chen Serina Lee
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Publication number: 20160009926Abstract: The present invention relates to derivatives of ?, ?-disubstituted amide compounds which comprise a substituted aryl at the a carbon such that the substituent provides a means for attachment or incorporation of the compound to or in a polymer. The provision of such a substituent on the aryl has surprisingly been found not only to permit attachment to or incorporation n a polymer but also retention of useful antifouling activity. In embodiments, the substituent is selected from hydroxyl, ethers, esters, carboxyls, alkylsilyls and alkenyls. Experiments demonstrate that antifouling activity can be as good or better as the corresponding unsubstituted compound and that polymers functionalised so as to include or be formed from the substituted compound can be used to reduce settlement.Type: ApplicationFiled: September 21, 2015Publication date: January 14, 2016Inventors: Christina Li Lin Chai, Brendan Adrian Burkett, Serena Lay Ming Teo, Daniel Rittschof, Serina Siew Chen Lee, Gary Howard Dickinson, Han Hong
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Patent number: 9169223Abstract: The present invention relates to derivatives of ?,?-disubstituted amide compounds which comprise a substituted aryl at the ? carbon such that the substituent provides a means for attachment or incorporation of the compound to or in a polymer. The provision of such a substituent on the aryl has surprisingly been found not only to permit attachment to or incorporation in a polymer but also retention of useful antifouling activity. In embodiments, the substituent is selected from hydroxyl, ethers, esters, carboxyls, alkylsilyls and alkenyls. Experiments demonstrate that antifouling activity can be as good or better as the corresponding unsubstituted compound and that polymers functionalized so as to include or be formed from the substituted compound can be used to reduce settlement.Type: GrantFiled: February 2, 2011Date of Patent: October 27, 2015Assignees: Agency for Science, Technology and Research, National University of SingaporeInventors: Christina Li Lin Chai, Brendan Adrian Burkett, Serena Lay Ming Teo, Daniel Rittschof, Serina Siew Chen Lee, Gary Howard Dickinson, Han Hong
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Publication number: 20120301423Abstract: The present invention relates to derivatives of ?,?-disubstituted amide compounds which comprise a substituted aryl at the ? carbon such that the substituent provides a means for attachment or incorporation of the compound to or in a polymer. The provision of such a substituent on the aryl has surprisingly been found not only to permit attachment to or incorporation in a polymer but also retention of useful antifouling activity. In embodiments, the substituent is selected from hydroxyl, ethers, es ters, carboxyls, alkylsilyls and alkenyls. Experiments demonstrate that antifouling activity can be as good or better as the corresponding unsubstituted compound and that polymers functionalised so as to include or be formed from the substituted compound can be used to reduce settlement.Type: ApplicationFiled: February 2, 2011Publication date: November 29, 2012Applicants: AGENCY FOR SCIENCE, TECHNOLOGY AND RESEARCH, MARITIME AND PORT AUTHORITY OF SINGAPORE, NATIONAL UNIVERSITY OF SINGAPOREInventors: Christina Li Lin Chai, Brendan Adrian Burkett, Serena Lay Ming Teo, Daniel Rittschof, Serina Siew Chen Lee, Gary Howard Dickinson, Han Hong
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Publication number: 20110092518Abstract: The present invention relates to the use of compounds which have the following general formula (I), wherein R1 and R2 are independently selected from optionally substituted aryl, optionally substituted C1 to C12 alkyl and H; and R3 and R4 are independently selected from hydroxy, optionally substituted C1 to C6 alkyl, optionally substituted phenyl and H, in a method of preventing or reducing fouling, particularly in the marine environment. The compounds of the present invention have the considerable advantage of providing the antifouling coating market with an organic alternative to the existing technology which relies heavily on the addition of copper to obtain significant antifouling effects. The compounds we have developed may be used as cheap, easy to prepare additives that do not contain metals and therefore have reduced toxicity in marine environment.Type: ApplicationFiled: May 18, 2009Publication date: April 21, 2011Applicants: NATIONAL UNIVERSITY OF SINGAPORE, AGENCY FOR SCIENCE, TECHNOLOGY AND RESEARCH, MARITIME AND PORT AUTHORITY OF SINGAPOREInventors: Lay Ming Serena Teo, Daniel Rittschof, Felicity Jameson, Christina Chai, Chia Lung Chen, Siew Chen Serina Lee
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Publication number: 20110041725Abstract: Methods and compositions are provided for the reduction of fouling of objects present in marine environments. The methods and compositions include anticoagulants, such as, for example, glycosaminoglycans, coumarin-type molecules, metal chelators, plasminogen activators and platelet inhibitors. The methods include reducing marine fouling, comprising incorporating an anticoagulant compound into a marine coating. In addition, the methods include identifying compounds useful for reducing marine fouling, comprising measuring either blood coagulation or barnacle cement polymerization in the presence and absence of the compound, wherein a reduction in the blood coagulation or the barnacle cement polymerization in the presence of the compound identifies the compound as useful for reducing marine fouling. The coagulation or the polymerization can be measured by a serine protease activity or a transglutaminase activity.Type: ApplicationFiled: June 13, 2008Publication date: February 24, 2011Inventors: Daniel Rittschof, Gary H. Dickinson, Beatriz Orihuela de Diaz, Eric R. Holm
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Publication number: 20060110456Abstract: There is provided a method of biocidal and/or biostatic treatment and compounds and compositions thereof. In particular, there is provided a composition comprising at least one compound having the formula R1R2NR3, wherein R1, R2 and R3, are selected from the group consisting of hydrido, alkyl, aryl, heteroaryl, cycloalkyl, cycloaryl, cycloheteroaryl, alkenyl and alkynyl. In particular, the compounds and compositions of the invention are suitable for preventing, reducing and/or eliminating biofilms and/or fouling.Type: ApplicationFiled: November 3, 2005Publication date: May 25, 2006Applicant: NATIONAL UNIVERSITY OF SINGAPOREInventors: Serena Lay Ming Teo, Amy Mei Fun Choong, Tsai Min Sin, Daniel Rittschof, James Maki
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Patent number: 5259701Abstract: Certain furan compounds are disclosed as being useful as marine or fresh water antifoulant compounds to be used in protective carrier compositions such as film forming polymer to protect fish nets, boats, pilings, and piers.Type: GrantFiled: October 22, 1992Date of Patent: November 9, 1993Assignee: Rohm and Haas CompanyInventors: Donald L. Gerhart, Daniel Rittschof, Irving R. Hooper, Anthony Clare
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Patent number: 5248221Abstract: Certain gamma lactones are disclosed as being useful as marine or fresh water antifoulant compounds to be used in protective carrier compositions such as film forming polymer to protect fish nets, boats, pilings, and piers.Type: GrantFiled: October 22, 1992Date of Patent: September 28, 1993Assignee: Rohm and Haas CompanyInventors: Donald J. Gerhart, Daniel Rittschof, Irving R. Hooper
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Patent number: 4788302Abstract: A tissue extract containing a low molecular weight, non-proteinaceous compound selected from the group consisting of (A) methanol-soluble compounds obtainable from Leptogorgia virgulata with R.sub.f values in reverse-phase, thin layer, silica gel chromatography of (1) 0.42, 0.54, and 0.62; (2) 0.35, 0.50, and 0.58; (3) 0.37, 0.47, and 0.58; or (4) 0.31, 0.43, and 0.54, respectively, in 1:1:1 methanol:ethyl acetate:water, 2:1:1 methanol:ethyl acetate:water, and 1:2:1 methanol:ethyl acetate:water, or (B) methanol-soluble compounds obtainable from Renilla reinformis with R.sub.f values in thin layer, silica gel chromatography of (1) 0:44, 0.37, and 0.53; (2) 0.52, 0.42, and 0.60; (3) 0.56, 0.43, and 0.63; or (4) 0.32, 0.26, and 0.37, respectively, in 9:1 chloroform:acetonitrile, 9:1 methylene chloride:acetonitrile, and 4:1 methylene chloride:acetonitrile and compositions containing the same, which is useful as antifouling compositions, is disclosed.Type: GrantFiled: January 31, 1986Date of Patent: November 29, 1988Assignee: Duke UniversityInventors: John D. Costlow, Irving R. Hooper, Daniel Rittschof
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Patent number: 4704286Abstract: The gustatory additive of the present invention provides an improved fish bait. The gustatory additive causes a fish to hold a lure treated with the gustatory additive in its mouth for a longer period of time or causes the fish to swallow the lure. Because the fish holds the lure coated with the gustatory additive in its mouth for a relatively longer period of time, the fisherman has more time in which to set the hook in the fish's mouth.The gustatory additive of the present invention is comprised of a mixture of nutrients that are mixed with a water insoluble matrix and then applied to the surface of a lure. The gustatory additive of the present invention can also be distributed throughout the lure.Type: GrantFiled: July 9, 1985Date of Patent: November 3, 1987Inventors: Daniel Rittschof, Gaspard X. Criner, Joseph Bonaventura