Patents by Inventor David N. Hardern
David N. Hardern 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: 5428044Abstract: There are disclosed compounds of the formula (I): ##STR1## in which the variables R.sub.1, R.sub.2, R.sub.3, R.sub.4, R.sub.5, R.sub.6, and X are defined in the specification. The compounds are useful as pharmaceuticals, especially as anti-inflammatory agents.Type: GrantFiled: October 15, 1993Date of Patent: June 27, 1995Assignee: Fisons plcInventors: John R. Bantick, David N. Hardern, Richard A. Appleton, John Dixon, David J. Wilkinson
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Patent number: 5376663Abstract: Compounds of formula (I), in which [R.sup.1 and R.sup.2 ], [R.sup.3 and R.sup.4 ] and [R.sup.5 and R.sup.6 ] represent a carbon-carbon bond or two hydrogen atoms; R.sup.2 additionally represents alkyl; R.sup.7, R.sup.8 and R.sup.9 represent groups including H or OH, R.sup.10 has various significances including alkyl and alkenyl; X and Y represent groups including O and (H, OH); R.sup.14, R.sup.15, R.sup.16, R.sup.17, R.sup.18, R.sup.19, R.sup.22 and R.sup.23 represent H or alkyl; R.sup.20 and R.sup.21 represent groups including O, (H, OH) and (H, O-alkyl), n is 1, 2 or 3, and in addition, Y, R.sup.10 and R.sup.23, together with the carbon atoms to which they are attached, may represent a heterocyclic ring, (with certain provisos) are described. Processes for making the compounds and pharmaceutical formulations containing them, e.g. for use as immunosuppressive agents, are also described.Type: GrantFiled: July 25, 1989Date of Patent: December 27, 1994Assignee: Fisons plcInventors: Martin E. Cooper, David K. Donald, David N. Hardern
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Patent number: 5179087Abstract: There are described compounds of formula I, ##STR1## wherein R.sup.1 represents H or OH; R.sup.2 represents H; in addition, R.sup.1 and R.sup.2 may together represent a second carbon-carbon bond between the carbon atoms to which they are attached; R.sup.3 represents OH or OCH.sub.3 ; X represents O or (H,OH); and Y represents O or N--OR.sup.4, in which R.sup.4 represents H or alkyl C.sub.1-6 ; provided that when R.sup.1 is OH, R.sup.2 is H and X is O, then Y does not represent O.Processes for their production and compositions containing them, eg. for use as immunosuppressive agents, are also described.Type: GrantFiled: August 17, 1990Date of Patent: January 12, 1993Assignee: Fisons plcInventors: David K. Donald, David N. Hardern, Martin E. Cooper, Mark Furber
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Patent number: 4956378Abstract: There are described compounds of formula I, ##STR1## in which Ar.sub.1 and Ar.sub.2, which may be the same or different, each independently represent phenyl or pyridinyl, the phenyl or the pyridinyl each optionally being substituted by one or more of halogen; hydroxy; --COOR.sub.12 ; trihalomethyl; alkoxy C1 to 6; alkyl C1 to 6; --NR.sub.1 R.sub.2 ; alkoxy C1 to 6 substituted by --NR.sub.1 R.sub.2 or by phenyl; or alkyl C1 to 6 substituted by --NR.sub.1 R.sub.2 or by --COOR.sub.12 ;R.sub.1 and R.sub.2, which may be the same or different, each independently represent hydrogen or alkyl C1 to 6,R.sub.3 represents hydrogen, alkyl C1 to 6, alkanoyl C1 to 6, benzoyl, --COOR.sub.8, or --CONHR.sub.11,R.sub.4, R.sub.5, R.sub.6 and R.sub.7, which may be the same or different each independently represent hydrogen, alkyl C1 to 6 or phenyl;R.sub.8 represents alkyl C1 to 6 or aryl,R.sub.11 represents alkyl C1 to 6 or aryl,R.sub.12 represents hydrogen or alkyl C1 to 6, and pharmaceutically acceptable derivatives thereof.Type: GrantFiled: February 10, 1989Date of Patent: September 11, 1990Assignee: Fisons plcInventors: Sidney C. Burford, David N. Hardern
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Patent number: 4824859Abstract: There are described compounds of formula I, ##STR1## in which Ar.sub.1 and Ar.sub.2, which may be the same or different, each independently represent phenyl or pyridinyl, the phenyl or the pyridinyl each optionally being substituted by one or more of halogen; hydroxy; --COOR.sub.12 ; trihalomethyl; alkoxy C1 to 6; alkyl C1 to 6; --NR.sub.1 R.sub.2 ; alkoxy C1 to 6 substituted by --NR.sub.1 R.sub.2 or by phenyl; or alkyl C1 to 6 substituted by --NR.sub.1 R.sub.2 or by --COOR.sub.12 ;R.sub.1 and R.sub.2, which may be the same or different, each independently represent hydrogen or alkyl C1 to 6,R.sub.3 represents hydrogen, alkyl C1 to 6, alkanoyl C1 to 6, benzoyl, --COOR.sub.8, or --CONHR.sub.11,R.sub.4, R.sub.5, R.sub.6 and R.sub.7, which may be the same or different each independently represent hydrogen, alkyl C1 to 6 or phenyl,R.sub.8 represents alkyl C1 to 6 or aryl,R.sub.11 represents alkyl C1 to 6 or aryl,R.sub.12 represents hydrogen or alkyl C1 to 6, and pharmaceutically acceptable derivatives thereof.Type: GrantFiled: May 3, 1984Date of Patent: April 25, 1989Assignee: Fisons plc.Inventors: Sidney C. Burford, David N. Hardern
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Patent number: 4810719Abstract: There are described compounds of formula I, ##STR1## in which either R.sub.2 represents hydrogen, alkyl or Ar.sub.2, andR.sub.3 represents hydrogen, alkyl or alkyl substituted by Ar.sub.3 ;or R.sub.2 and R.sub.3 together form the chain --(CH.sub.2).sub.m --;R.sub.4 and R.sub.5, which may be the same or different, each independently represent hydrogen, halogen, Ar, alkyl, or alkyl substituted by Ar,Ar.sub.1, Ar.sub.2 and Ar, which may be the same or different each independently represent aryl or aryl substituted by one or more ofhalogen, hydroxy, --CN, --COR.sub.6, trihalomethyl, alkoxy, alkoxy substituted by --COR.sub.6, alkoxy substituted by --NR.sub.7 R.sub.8, alkyl, alkyl substituted by --COR.sub.6, alkyl substituted by NR.sub.7 R.sub.8, alkoxy substituted by Ar.sub.3, S(O).sub.n R.sub.9, --NR.sub.7 R.sub.8 or OAr.sub.3 ;R.sub.6 represents --OR.sub.10, --NR.sub.7 R.sub.8, hydrogen or alkyl;R.sub.7 and R.sub.8, which may be the same or different, each independently represent hydrogen, alkyl, alkanoyl or Ar.Type: GrantFiled: May 10, 1985Date of Patent: March 7, 1989Assignee: Fisons plcInventors: Richard A. Appleton, Sidney C. Burford, David N. Hardern, David Wilkinson
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Patent number: 4518612Abstract: There are described compounds of formula I, ##STR1## in which Ra, Rb, Rc, Rd, Re, Rf and Rg, which may be the same or different, each represent hydrogen, amino, hydroxy, alkoxy, alkenyloxy, halogen, acyl, alkenyl, alkyl, or alkoxy substituted by phenyl,Rh is hydrogen, alkyl or --COOH.X is a hydrocarbon chain containing from 2 to 10 carbon atoms and optionally substituted by a hydroxy group,A has no significance or represents Y, OY, or SY and Y represents a C 1 to 4 hydrocarbon chain which is optionally substituted by alkyl C 1 to 4,E and G, which may be the same or different, each represent --O--, --S-- or --CH.sub.2 --, provided that at least one of E and G is --O-- or --S--,L, together with the carbon atoms to which it is attached, forms a benzene, furan, thiophene, pyrrole, or pyran-2-one ring,and pharmaceutically acceptable derivatives thereof.Type: GrantFiled: December 21, 1983Date of Patent: May 21, 1985Assignee: Fisons plcInventors: John R. Bantick, John Fuher, David N. Hardern, Thomas B. Lee
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Patent number: 4424231Abstract: There are described compounds of formula I, ##STR1## in which Ra, Rb, Rc, Rd, Re, Rf and Rg, which may be the same or different, each represent hydrogen, amino, hydroxy, alkoxy, alkenyloxy, halogen, acyl, alkenyl, alkyl, or alkoxy substituted by phenyl,Rh is hydrogen, alkyl or --COOH.X is a hydrocarbon chain containing from 2 to 10 carbon atoms and optionally substituted by a hydroxy group,A has no significance or represents Y, OY, or SY and Y represents a C 1 to 4 hydrocarbon chain which is optionally substituted by alkyl C 1 to 4,E and G, which may be the same or different, each represent --O--, --S-- or --CH.sub.2 --, provided that at least one of E and G is --O-- or --S--,L, together with the carbon atoms to which it is attached, forms a benzene, furan, thiophene, pyrrole, or pyran-2-one ring,and pharmaceutically acceptable derivatives thereof.Type: GrantFiled: March 19, 1982Date of Patent: January 3, 1984Assignee: Fisons LimitedInventors: John R. Bantick, John Fuher, David N. Hardern, Thomas B. Lee
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Patent number: 4213903Abstract: The present invention relates to salts with basic amino sugars or basic amino acids of certain 2-carboxy or 2-tetrazolo-chromones.Type: GrantFiled: January 16, 1978Date of Patent: July 22, 1980Assignee: Fisons LimitedInventors: John R. Bantick, David N. Hardern, Thomas B. Lee