Patents Assigned to Chemed Corporation
-
Patent number: 4719083Abstract: An all-in-one treatment composition for a water cooling tower includes a water soluble aromatic azole corrosion inhibitor such as benzotriazole, an organophosphorous antiscalant and a polymeric quaternary ammonium compound. The polymeric quaternary ammonium compound has the following general formula: ##STR1## The composition is suitable for use at low level continuous applications rates. The polymeric quaternary ammonium compound is also suitable for use at low concentration as a continuous biocide/biostat. This compound does not suffer from the acclimatization typically encountered when one biocide is used on a continuous low level basis.Type: GrantFiled: February 9, 1987Date of Patent: January 12, 1988Assignee: Chemed CorporationInventors: Gary L. Baker, Ronald J. Christensen
-
Patent number: 4681696Abstract: A detergent composition containing a stabilized active halogen source is disclosed. An active halogen source, such as a hypochlorite, in aqueous solution, is stabilized by combining it with known anhydrous or partially anhydrous builders, as well as fillers, defoamers, polyelectrolytes, and hydroxides to form a solid detergent composition. The aqueous solution of the active halogen source is first combined with at least one sulfonamide. The destaining activity of the halogen remains effective even after a prolonged storage period.Type: GrantFiled: January 22, 1986Date of Patent: July 21, 1987Assignee: Chemed CorporationInventors: Anthony J. Bruegge, Denny E. Daughtery
-
Patent number: 4406812Abstract: A composition for deodorizing and rejuvenating used metal working fluids comprising a compound which releases active oxygen, a compound which acts as an alkaline buffering agent and compound which provides an extreme pressure additive. Combinations of sodium perborate and sodium percarbonate are preferred. Additional sequestrants, buffering agents and extenders can also be employed.Type: GrantFiled: December 4, 1980Date of Patent: September 27, 1983Assignee: Chemed CorporationInventor: Jean C. Childers
-
Patent number: 4365200Abstract: A liquid conductivity cell utilizing the Kelvin four-electrode system, and a circuit to operate an alarm when the operating electrodes have reached a predetermined state of fouling. Thus, the invention cell self alarms when the electrodes have fouled. The electrodes each have two flow passageways, whereby the liquid takes a "U" shaped path, and whereby the outer electrode closest to the liquid inlet and outlet fittings sinks all stray currents and the like to thereby permit interference free operation.Type: GrantFiled: July 14, 1980Date of Patent: December 21, 1982Assignee: Chemed CorporationInventor: Herbert Goldsmith
-
Patent number: 4362994Abstract: A cell for measuring the conductivity of liquids flowing through the cell utilizing the Kelvin four-electrode system, plus a guard electrode, and a circuit to operate an alarm when the operating electrodes have reached a predetermined state of fouling. Thus, the invention cell self alarms when it has been fouled to the point where operating results will thereafter be impaired.Type: GrantFiled: July 14, 1980Date of Patent: December 7, 1982Assignee: Chemed CorporationInventors: Herbert Goldsmith, Richard M. Stilwell
-
Patent number: 4353745Abstract: An aqueous composition which produces a clear, protective coating on a wide variety of surfaces, consisting essentially of a suspension of vinylidene polymers, ethylene glycol monoethyl ether, ethylene glycol monobutyl ether, a halogenated polysilane surfactant, sodium benzoate rust proofer, defoamer (mineral oil in ethylene glycol monobutyl ether), and water. A cleaning and priming composition is also provided, for removal of graffiti and the protective coating. The latter comprises preferably ethylene glycol monoethyl ether, methylene chloride, nonylphenol ethoxylate, triethanolamine, and water.Type: GrantFiled: August 26, 1981Date of Patent: October 12, 1982Assignee: Chemed CorporationInventor: Robert E. Ebbeler
-
Patent number: 4306991Abstract: This invention relates to an improved composition for inhibiting deposition of scale in aqueous systems. More specifically, it relates to the use of small quantities of an improved composition for preventing formation of scale and sludge deposits in steam generating boilers. The composition is characterized by the fact that by using a plurality of selected ingredients a synergistic effect is obtained. The ingredients comprise a copolymer of styrene sulfonic acid and maleic anhydride or maleic acid, along with a water soluble organophosphonic acid compound.Type: GrantFiled: July 31, 1980Date of Patent: December 22, 1981Assignee: Chemed CorporationInventors: Chih M. Hwa, Dionisio G. Cuisia
-
Patent number: 4298018Abstract: Method of pumping viscous liquids, e.g., detergents, using an eductor and a predetermined intermittent cycle.Type: GrantFiled: July 29, 1980Date of Patent: November 3, 1981Assignee: Chemed CorporationInventor: William J. Haggard
-
Patent number: 4278635Abstract: A method for boiler water treatment to retard corrosion due to dissolved oxygen. Hydroquinone and certain related compounds are highly effective oxygen scavengers for use in boiler water and thereby effect reduction of corrosion resulting from dissolved oxygen.Type: GrantFiled: December 26, 1979Date of Patent: July 14, 1981Assignee: Chemed CorporationInventor: Herman Kerst
-
Patent number: 4256703Abstract: To a coal-fired furnace that uses electrostatic precipitation or a mechanical collector to collect fly ash, a mix of magnesia-alumina or magnesia-talc is added above the fireball (2600.degree.-3300.degree. F.). The additive increases the mean particle size of the fly ash and reduces its surface resistivity, thereby causing improved collection in the electrostatic precipitators or mechanical collector. Fine particulates containing heavy metals tend to be agglomerated; thus the invention permits recovery of substantial amounts of heavy metal contaminants that would otherwise be lost as stack emission.Type: GrantFiled: December 26, 1979Date of Patent: March 17, 1981Assignee: Chemed CorporationInventors: Shyam N. S. Dixit, Douglas I. Bain, David A. Carter
-
Patent number: 4255259Abstract: This invention relates to an improved method for inhibiting deposition of scale in aqueous systems. More specifically, it relates to the use of small quantities of an improved composition for preventing formation of scale and sludge deposits in steam generating boilers. The composition is characterized by the fact that by using a plurality of selected ingredients a synergistic effect is obtained. The ingredients comprise a copolymer of styrene sulfonic acid and maleic anhydride or maleic acid, along with a water soluble organophosphonic acid compound.Type: GrantFiled: September 18, 1979Date of Patent: March 10, 1981Assignee: Chemed CorporationInventors: Chih M. Hwa, Dionisio G. Cuisia
-
Patent number: 4248728Abstract: A paste type scouring cleanser containing colloidal magnesium aluminum silicate, alkali, optionally a bleach, zeolite, optionally an abrasive, a surfactant, and optionally sodium hexametaphosphate, all in aqueous dispersion.Type: GrantFiled: February 28, 1979Date of Patent: February 3, 1981Assignee: Chemed CorporationInventor: Robert L. Puryear
-
Patent number: 4245573Abstract: An additive, e. g., MgO.Mg silicate, is injected into the flue gas stream of a coal-or oil-fired furnace, at 2300-1700 deg. F., thereby reducing accumulation of sulfuric acid on the air heater inlet and outlet.Type: GrantFiled: December 22, 1978Date of Patent: January 20, 1981Assignee: Chemed CorporationInventors: Shyam N. S. Dixit, Douglas I. Bain, David A. Carter
-
Patent number: 4242216Abstract: Dichlorodimethyl hydantoin stabilized for use in alkaline detergent formulations by forming granules or briquettes of a minimum size and hardness.Type: GrantFiled: September 27, 1979Date of Patent: December 30, 1980Assignee: Chemed CorporationInventors: Denny E. Daugherty, Edwin R. Loder, Gary L. Young
-
Patent number: 4230592Abstract: Liquid additive for caustic soda cleaning solutions. Provides surfactants, foam control, and scale control; and good wetting and emulsifying properties for improved cleaning and ease of rinsing.Type: GrantFiled: May 31, 1979Date of Patent: October 28, 1980Assignee: Chemed CorporationInventors: Jack Miller, Thomas C. Tesdahl
-
Patent number: 4228048Abstract: Liquid cleaning and bleaching concentrate which generates copious foam on dilution with water in a mechanical foam generator. Contains modified polyacrylic acid salt, sodium tripolyphosphate, sodium hydroxide, sodium silicate, sodium hypochlorite sodium alkane sulfonate, and (optionally) sodium polyacrylate.Type: GrantFiled: May 25, 1979Date of Patent: October 14, 1980Assignee: Chemed CorporationInventor: Thomas C. Tesdahl
-
Patent number: 4225471Abstract: A novel hydrocarbon containing cleaning composition is used in conjunction with conventional laundry detergents to remove dirt and/or oily deposits from fabrics not ordinarily removable by conventional laundry processes.Type: GrantFiled: September 25, 1978Date of Patent: September 30, 1980Assignee: Chemed CorporationInventors: Robert T. Claus, William H. Frisz
-
Patent number: 4222131Abstract: A quick release for the back rest (Fowler) of hospital stretchers. The conventional threaded crank actuator carries a mating threaded block and a sliding block, the sliding block being connected to the head rest. Manually operated hook means permits disengagement between the blocks to free the back rest. Inadvertent disengagement preventing safety means, and re-engagement means are also provided.Type: GrantFiled: September 15, 1978Date of Patent: September 16, 1980Assignee: Chemed CorporationInventors: Donald H. Holdt, James S. Sims, Jr.
-
Patent number: 4215004Abstract: Heavy duty built laundry washing product in slurry form containing alkali metal hydroxide, detergents, sodium polyacrylate, a modified polyacrylic acid salt, and water insoluble aluminosilicate ion exchange material and/or complex phosphates; also optionally optical brightener, coloring agent, carboxymethyl cellulose and salts thereof, and perfume.Type: GrantFiled: March 28, 1979Date of Patent: July 29, 1980Assignee: Chemed CorporationInventors: James F. Borgerding, Robert T. Claus
-
Patent number: 4204954Abstract: Detoxification of residues of quaternary ammonium salt biocides in water, using neutralizing amounts of anionic monomers.Type: GrantFiled: June 8, 1979Date of Patent: May 27, 1980Assignee: Chemed CorporationInventor: Jose T. Jacob