Patents by Inventor Robert C. Wasson
Robert C. Wasson 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: 6034205Abstract: Products intended for use as hand mouldable materials should meet the objectives of not causing pain to the user when held in the hand, and retaining malleability for a sufficient but not excessive length of time.The invention hand-mouldable compositions comprise selected copolymers of lactones and lactides which manifest a melt temperature T.sub.m in the range of from 48 to 58.degree. C. and a crystallisation temperature T.sub.c in the range of from 16 to 30.degree. C. They are preferably produced from .epsilon. caprolactone and L-lactide, most desirably in a weight ratio of from 94:6 to 91:9, and especially at a reaction temperature in the range of from 150 to 190.degree. C. They are often coloured and can be employed in kits.Type: GrantFiled: July 23, 1998Date of Patent: March 7, 2000Assignee: Solvay (Societe Anonyme)Inventors: Amanda J. Dutton, Robert C. Wasson
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Patent number: 5387724Abstract: Phenols, and related aromatic compounds, phenolic ethers, can be hydroxylated selectively using hydrogen peroxide in the presence of an amorphous or microcrystalline zirconium phosphate catalyst in a solvent containing an aliphatic carboxylic acid. The process is particularly suitable for phenol itself, and advantageously employs a partially dehydrated microcrystalline catalyst obtained by heating an hydrated microcrystalline zirconium phosphate for example at about 100.degree. C. A convenient reaction temperature is 50.degree. to 90.degree. C., and convenient solvent is acetic acid. In an improved method of producing the catalyst, zirconium phosphate is precipitated from an aqueous phosphoric acid solution of zirconium oxychloride in the presence of a cationic phase transfer agent such as an alkylpyridinium salt or tetraalkylquaternary ammonium salt or a nonionic surfactant such as an alcohol ethoxylate.Type: GrantFiled: October 12, 1993Date of Patent: February 7, 1995Assignee: Solvay Interox LimitedInventors: Alexander Johnstone, William R. Sanderson, Robert C. Wasson
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Patent number: 5190723Abstract: A process for inhibiting corrosion involves new compositions which comprise an organic material and, a corrosion inhibitor which is a compound having the formula: ##STR1## wherein R.sup.1 and R.sup.2 may be the same or different and each is hydrogen, C.sub.1 -C.sub.15 alkyl, C.sub.3 -C.sub.15 alkenyl, C.sub.7 -C.sub.10 phenylalkyl, C.sub.6 -C.sub.18 aryl having 6 or 10 aromatic ring carbon atoms; or C.sub.5 -C.sub.12 cycloalkyl;R.sup.3 is hydrogen or C.sub.1 -C.sub.4 alkyl; n is 0 or 1;A is a residue of a heterocyclic ring having 5-7 ring members and 1-4 nitrogen atoms, or A is a residue of a heterocyclic ring having 5-7 ring members and 1-4 nitrogen atoms and is fused to a further heterocyclic ring or to a carbocyclic ring, or A is a carbocyclic ring, in particular a phenyl or naphthyl ring, and wherein R is one or more of hydrogen, C.sub.1 -C.sub.15 alkyl, C.sub.1 -C.sub.4 halogenoalkyl, C.sub.1 -C.sub.12 alkoxy, C.sub.1 -C.sub.12 alkylthio, phenylthio, benzylthio, C.sub.1 -C.sub.Type: GrantFiled: December 3, 1990Date of Patent: March 2, 1993Assignee: Ciba-Geigy CorporationInventors: Emyr Phillips, Robert C. Wasson
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Patent number: 5183842Abstract: The present invention provides coating compositions comprisinga) an organic film-forming binder; andb) a corrosion-inhibiting amount of a salt ofi) a ketoacid having the formula (I): ##STR1## wherein a is 1,2,3,4 or 5; the R substituents are the same or different and each is hydrogen; halogen; nitro; cyano; CF.sub.3 ; C.sub.1 -C.sub.15 alkyl; C.sub.5 -C.sub.12 cycloalkyl; C.sub.2 -C.sub.15 alkenyl; C.sub.1 -C.sub.12 halogenoalkyl; C.sub.1 -C.sub.12 alkoxy; C.sub.1 -C.sub.12 thioalkyl; C.sub.6 -C.sub.12 aryl; C.sub.6 -C.sub.10 aryloxy; C.sub.7 -C.sub.12 alkaryl; --CO.sub.2 R.sub.1 in which R.sub.1 is a) hydrogen, b) C.sub.1 -C.sub.20 alkyl optionally interrupted by one or more O-, N- or S-atoms, c) C.sub.7 -C.sub.12 alkaryl or d) C.sub.6 -C.sub.12 aryl optionally substituted with one or more carboxy groups; --COR.sub.1 in which R.sub.1 has its previous significance; NR.sub.2 R.sub.3 in which R.sub.2 and R.sub.3 are the same or different and each is hydrogen or C.sub.1 -C.sub.Type: GrantFiled: April 22, 1992Date of Patent: February 2, 1993Assignee: Ciba-Geigy CorporationInventors: Robert M. O'Neil, Emyr Phillips, Robert C. Wasson
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Patent number: 5169950Abstract: Compounds of the formula I ##STR1## wherein R, R.sup.1, R.sup.2, R.sup.3, and R.sup.5 have the meaning given in claim 1 are formed by thermal rearrangement of the isomers of formula V ##STR2## especially in the presence of basic catalysts. The compounds are corrosion inhibitors for organic materials, in particular coating materials and lubricants. In these substrates they also act as antioxidants and light-stabilizers and are very stable to heat.Type: GrantFiled: August 19, 1991Date of Patent: December 8, 1992Assignee: Ciba-Geigy CorporationInventors: Adalbert Braig, Hans-Rudolf Meier, David G. Leppard, Robert C. Wasson, Emyr Phillips
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Patent number: 5128396Abstract: The present invention provides coating compositions comprisinga) an organic film-forming binder; andb) a corrosion-inhibiting amount of a salt ofi) a ketoacid having the formula (I): ##STR1## wherein a is 1,2,3,4 or 5; the R substituents are the same or different and each is hydrogen; halogen; nitro; cyano; CF.sub.3 ; C.sub.1 -C.sub.15 alkyl; C.sub.5 -C.sub.12 cycloalkyl; C.sub.2 -C.sub.15 alkenyl; C.sub.1 -C.sub.12 halogenoalkyl; C.sub.1 -C.sub.12 alkoxy; C.sub.1 -C.sub.12 thioalkyl; C.sub.6 -C.sub.12 aryl; C.sub.6 -C.sub.10 aryloxy; C.sub.7 -C.sub.12 alkaryl; --CO.sub.2 R.sub.1 in which R.sub.1 is a) hydrogen, b) C.sub.1 -C.sub.20 alkyl optionally interrupted by one or more O--, N-- or S--atoms, c) C.sub.7 -C.sub.12 alkaryl or d) C.sub.6 -C.sub.12 aryl optionally substituted with one or more carboxy groups; --COR.sub.1 in which R.sub.1 has its previous significance; NR.sub.2 R.sub.3 in which R.sub.2 and R.sub.3 are the same or different and each is hydrogen or C.sub.1 -C.sub.Type: GrantFiled: August 1, 1990Date of Patent: July 7, 1992Assignee: Ciba-Geigy CorporationInventors: Robert M. O'Neil, Emyr Phillips, Robert C. Wasson
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Patent number: 5097039Abstract: Compounds of the formula I ##STR1## wherein R, R.sup.1, R.sup.2, R.sup.3, R.sup.4 and R.sup.5 have the meaning given in claim 1 are formed by thermal rearrangement of the isomers of formula V ##STR2## especially in the presence of basic catalysts. The compounds are corrosion inhibitors for organic materials, in particular coating materials and lubricants. In these substrates they also act as antioxidants and light-stabilizers and are very stable to heat.Type: GrantFiled: August 14, 1989Date of Patent: March 17, 1992Assignee: Ciba-Geigy CorporationInventors: Adalbert Braig, Hans-Rudolf Meier, David G. Leppard, Robert C. Wasson, Emyr Phillips
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Patent number: 5069805Abstract: Compounds of the formula I ##STR1## wherein R, R.sup.1, R.sup.2, R.sup.3, R.sup.4 and R.sup.5 have the meaning given in claim 1 are formed by thermal rearrangement of the isomers of formula V ##STR2## especially in the presence of basic catalysts. The compounds are corrosion inhibitors for organic materials, in particular coating materials and lubricants. In these substrates they also act as antioxidants and light-stabilizers and are very stable to heat.Type: GrantFiled: September 14, 1990Date of Patent: December 3, 1991Assignee: Ciba-Geigy CorporationInventors: Adalbert Braig, Hans-Rudolf Meier, David G. Leppard, Robert C. Wasson, Emyr Phillips
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Patent number: 4894091Abstract: Compounds of the formula I ##STR1## wherein R, R.sup.1, R.sup.2, R.sup.3, R.sup.4 and R.sup.5 have the meaning given in claim 1 are formed by thermal rearrangement of the isomers of formula V ##STR2## especially in the presence of basic catalysts. The compounds are corrosion inhibitors for organic materials, in particular coating materials and lubricants. In these substrates they also act as antioxidants and light-stabilizers and are very stable to heat.Type: GrantFiled: August 17, 1987Date of Patent: January 16, 1990Assignee: Ciba-Geigy CorporationInventors: Adalbert Braig, Hans-Rudolf Meier, David G. Leppard, Robert C. Wasson, Emyr Phillips