Abstract: The present invention prolongs the biocidal activity of hydrated lime in a paint or coating by using a sufficient amount of a binder in the paint or coating to block carbon dioxide from reacting with the hydrated lime while still producing a coating that is durable and adhesive upon drying and not unduly friable due to the amount of hydrated lime in said coating

Abstract: A method of fixation of hazardous waste materials is disclosed wherein the hazardous waste is admixed with materials capable of reacting in situ to form zeolites and the mixture subjected to conditions sufficient to form zeolites in which the hazardous material is part of the zeolite structure. The invention also relates to the resultant synthetic zeolite and to products formed by embedding the synthetic zeolites in a modified sulfur cement.

Abstract: An implantable infection shield and system for drug delivery in vascular tissue includes a relatively non-biodegradable porous linked fibrous biomaterial which controls and directs cell growth and angiogenesis from adjacent vascular tissue into the implant. Infection shield embodiments stimulate cell growth and angiogenesis from adjacent vascular tissue which effectively blocks passage of pathogenic microorganisms along percutaneously implanted objects. In embodiments for drug delivery, a reservoir of the same biomaterial may contain either (1) a cell culture system enclosed within a porous sealable interior chamber or (2) a biodegradable matrix in which one or more drugs are dispersed. After implantation of a reservoir of the first embodiment in an organism, cultured cells obtain food and oxygen via diffusion in tissue fluid through the porous walls of the interior chamber, while metabolic products, including drugs, diffuse away from the cell culture in an analogous manner.

Abstract: A method is disclosed for making dibasic amino acid monoesters useful in repair of teeth in which a dibasic amino acid is partially esterified with an allylic acrylic compound in the presence of an acidic ion-exchange resin at ambient temperature. The invention also comprises cyclicizing the amino groups of the monoesters.

Abstract: An apparatus and method for visually and continuously monitoring gaseous concentrations of electrophiles such as carbon dioxide. A coating composition comprising an organic binder, filler/pigment, an activator, and carbon dioxide sensitive color indicator interacts with a primed substrate to which it is applied for support. The coated primed substrate may then be used for estimation of carbon dioxide concentration by the detection of a substantially instantaneous and reversible color change of the coated primed substrate.

Abstract: Disclosed is a commercial grade of soluble silicate solutions, clear homogenous and water white essentially free of unreacted silica, made by dissolving in a closed container biogenetic silica, preferably rice hull ash, in a strong alkali solution, preferably sodium hydroxide in the presence of an agent, such as an active carbonaceous material, which prevents discoloration of the soluble silicates by absorbing and/or reacting with polyvalent metals, organic materials, and the like, in the biogenetic silica as it dissolves in and reacts with the alkali solution. The invention takes advantage of the residue of such active carbonaceous material on the biogenetic silica, such as rice hulls, left by commercial energy burning thereof which effectively prevents discoloration. A solid residue results from the method which is an active carbonaceous material including concentrated manganese from the biogenetic silica, both of which are valuable commercial products.

Abstract: A composition for use in repair of teeth in which a dibasic amino acid partially esterified with allyl alcohol or a hydroxyacrylate or methacrylate and cyclicized, is utilized and the method of tooth repair comprising applying the composition to a tooth requiring repair and curing the composition.

Abstract: An apparatus for attracting and destroying insects includes a housing, a canister secured to the housing and containing carbon dioxide, and a discharge device for discharging the carbon dioxide from the canister and into the housing. The apparatus further includes a source of octenol provided in the housing, and a device for introducing and mixing the octenol with the carbon dioxide within the housing. The mixture of carbon dioxide and octenol is released from the housing for attracting insects. A heat source is also provided for further attracting insects, and an electric grid secured to and surrounding the housing destroys the insects upon their contacting the grid.

Abstract: A method of immobilizing toxic waste material slurries is disclosed wherein aggregates are formed containing the toxic waste and the aggregates admixed with and embedded in a sulfur cement to form a concrete shape.

Abstract: Apparatus and method for determining the amount of oxidative and hydrolytic degradation in the surface of a highly resistive material, such as a polymer. A special probe provides an annular resistance on the surface of a sample of the material. The voltage drop across the sample determines the input to a meter circuit. A guard circuit has an applied voltage that is substantially the same as the voltage at the meter circuit input. This circuitry permits a very low voltage source to be used.

Abstract: The present invention provides a method for maintaining the mechanical integrity and for maximizing the chemical integrity of a core sample during transport from a subterranean formation to the surface. The method involves cutting and encapsulating a core sample with an encapsulating material that increases in viscosity or even solidifies, at temperatures slightly lower than those expected downhole, or relatively early in the transport process. A preferred encapsulating material contains at least one polyglycol or chemically modified polyglycol from the oxyalkylene polymer family. The specific formulation of the encapsulating material differs depending upon the expected downhole conditions. For example, the encapsulating material can include a thickener, a nucleating agent, and a water swellable material or another inert material that is capable of sealing the core sample against water.

Abstract: A composition of matter comprises 100-800 parts by weight polyethylenes and copolymers thereof having a melt index of 1-4 g/10 min., a density of 0.93-0.95 g/cc and a weight average molecular weight of 5-1.0.times.10.sup.5 ; 100-400 parts by weight polyethylenes having a melt index of 2-4 g/10 min., a density of 0.93-0.95 g/cc and a molecular weight of 6-20.times.10.sup.4 ; 0-100 parts by weight polypropylene having a melt index of 5-9 g/10 min. and a density of 0.8-1.2 g/cc; 0-150 parts by weight copolymer such as ethylene-propylene or ethylene-vinyl acetate; 0-100 parts by weight graphite or carbon black; 0.04-0.2 parts by weight antioxidant; and 0.1-2.0 parts by weight light stabilizer. A sealant is obtained by compression, extrusion or injection molding the composition described above. A polyethylene surface repair or reinforcing kit comprises the sealant or thermoplastic repair material of the invention, a thin, heat-resistant, adhesion-resistant barrier, and a polyethylene surface enzyme cleaner.

Abstract: A low cost cement composition that can be admixed with water and hydrothermally closed cured to give acid-resistant products of high compressive strength consisting essentially of, in parts by weight, 1 to 1.5 parts of a calcium oxide material containing at least about 60% CaO, 10 to 15 parts of pozzolanic material containing at least about 30% by weight amorphous silica, and 0.025 to 0.075 parts by weight of an alkali metal catalyst and building materials made therefrom as well as the method of making such building materials by closed curing.

Abstract: A paint or coating composition and method for detecting vapor or liquid reactants, such as ammonia. The composition is composed of ethyl cellulose as a binder, a filler, such as amorphous silica, and a dye, such as bromophenol blue. The composition serves as a passive detector for vapor or liquid reactants when applied to selected surfaces as a paint. The composition is capable of detecting extremely low concentrations of vapor. Further, the composition is capable of regenerating to its original color, thereby providing repeated detection capability.

Abstract: A paint or coating composition and method for detecting vapor or liquid reactants, such as ammonia. The composition is composed of ethyl cellulose as a binder, a filler, such as amorphous silica, and a dye, such as bromophenol blue. The composition serves as a passive detector for vapor or liquid reactants when applied to selected surfaces as a paint. The composition is capable of detecting extremely low concentrations of vapor. Further, the composition is capable of regenerating to its original color, thereby providing repeated detection capability.

Abstract: A fire pouch is provided for protecting flammable documents from both fire and water damage. The fire pouch includes a thin pliable water-type exterior container which houses a gelled water material to absorb thermal energy during the fire. The fire pouch further comprises a hydrated intumescent material layer which is secured to the exterior container, and both absorbs thermal energy and intumesce during a fire to produce a foam layer which provides substantially increased fire protection. The gelled water layer and the hydrated intumescent material layer form a relatively thin pliable rectangular-shaped blanket having a seam which divides the blanket into a base portion and a cover portion. The blanket unfolds by bending substantially along the seams to receive the flammable documents, and folds into its protective position such that the documents are sandwiched between the based portion and the covered portion to protect the docments during a fire.

Abstract: A method for calcination of a calcium carbonate material comprising heating the calcium carbonate material to a temperature and for a time sufficient to calcine the material to the degree desired while in the presence of a catalyst; said catalyst comprising at least one fused salt having the formulaMCO.sub.3.CaCO.sub.3.CaO.H.sub.2 O.sub.x,wherein M is an alkali metal and x is 0 to 1 and formed by fusing MCO.sub.3 and CaCO.sub.3 in a molar ratio of about 1:2 to 2:1, and a blend adapted to be heated to CaO comprising a calcium carbonate material and at least one such fused salt.

Abstract: The method of treating a limestone slurry to remove water therefrom comprising admixing therewith at least about 0.25 part by weight of a fluidizing agent for each 100 parts by weight of solids in said slurry, said fluidizing agent consisting essentially of a micelle-forming surfactant and a protective colloid in a ratio of from about 2:1 to 1:2; the resultant limestone mud containing at least about 70% solids; and a fluidizing agent for dewatering a limestone slurry consisting essentially of a micelle-forming surfactant and a protective colloid in a ratio of from about 2:1 to 1:2.

Abstract: A sprayable composition for forming a transient film for controlling soil erosion and moisture evaporation consisting essentially of an alkali metal silicate, a liquid, an environmentally degradable moisture vapor barrier-forming material selected from elastomers, aliphatic hydrocarbons, animal and vegetable fats, hydrogenated oils and mixtures thereof, and an agent for stabilizing said composition and the method of controlling soil erosion and moisture evaporation utilizing the aforesaid composition.

Abstract: A soil stabilizing composition comprising Portland cement and a hydrated alkali metal silicate powder and the method of stabilizing soil comprising admixing the composition with a soil and compressing the mixture.