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William F. Semple, a dentist, was awarded the first US Patent on chewing gum in 1869. His recipe contained powdered chalk.
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| Number | Title | Issue Date |
| 7399389 | Corrosion inhibitor dispensing apparatus and methods A corrosion inhibitor dispensing apparatus has a housing with a fluid inlet and a fluid outlet. A first body within the housing comprises a cathodic corrosion inhibitor. A second body within the housing comprises an anodic corrosion inhibitor. ... | 07/15/2008 |
| 7351386 | Cartridge holder for automated reprocessor A cartridge holder (30) for an automated endoscope reprocessor (10) is mounted on a movable rack (14). As the rack is wheeled into the chamber, a connector (164) on the cartridge holder (164) automatically makes a fluid connection ... | 04/01/2008 |
| 7207503 | Chemical dispensing means for a travelling lawn sprinkler A chemical dispenser which is selectively removably mounted on a travelling lawn sprinkler. The chemical dispenser dispenses liquid chemical into the water being sprinkled onto the lawn by the water distributor as the self-propelled travelling lawn sprinkler propels... | 04/24/2007 |
| 7172739 | Protein fractionation A method and apparatus for physically separating polypeptide constituents of a sample fluid by (a) providing a sample fluid comprising a mixture of polypeptides of differing physical and/or chemical properties; (b) contacting the fluid with at least two individual p... | 02/06/2007 |
| 7172738 | Methods and apparatus for processing mixtures of liquids and solids One embodiment provides for a liquids/solids reaction vessel configured to contain a mixture of at least one liquid and at least one solid. The vessel includes a closed perimeter wall defined by an effective height, and a bottom connected to the closed perimeter wal... | 02/06/2007 |
| 7147770 | Activity enhanced dispensers A liquid treatment method and system with the liquid treatment system having a container for holding a liquid treatment material therein with the liquid treatment device effectively positionable in various transitional regions in the liquid system to provide for an ... | 12/12/2006 |
| 7078003 | Device for the transfer of energy and/or matter between a soluble solid and a liquid The invention relates to a device for the transfer between a solid matter and a liquid, comprising an outer drum and a perforated inner drum, means for commonly rotating the drums, and means situated inside the inner drum for moving the solid matter. In between the ... | 07/18/2006 |
| 6764861 | Method of making high efficiency magnetic sensor for magnetic particles A method of making a high efficiency magnetic sensor for determining the presence or amount of an analyte in a test sample. The method typically includes providing a sensing device with a magnetic sensing element, exposing the sensing device to a fluid test medium s... | 07/20/2004 |
| 6749748 | Methods for reducing the amount of contaminants in water In one aspect the present invention provides purification devices for reducing the amount of contaminants in water, each device includes a water-soluble flocculant disposed within a body defining a multiplicity of pores, wherein the pores have an average diameter in... | 06/15/2004 |
| 6676908 | Neutralizing chemical dispenser with removable cover layer A device and method for dispensing chemical agents into a body of water includes a plastic, Bucket-like container having the chemical agents disposed therein. The side walls of the container are perforated with a plurality of perforations. Wrapped around ... | 01/13/2004 |
| 6558538 | Device for preventing the clogging of a drainage system The present invention provides a method and device for preventing the formation of deposits in a drainage system (100). The device (10) includes a container (12, 212), connected by a flexible cord (20) to a stopper (22). An antimicrobial composition (24) ... | 05/06/2003 |
| 6503467 | Chemical dispenser with removable cover layer A device for dispensing chemical agents into a body of water includes a plastic, bucket-like container having the chemical agents disposed therein. The side walls of the container are perforated with a plurality of perforations. Wrapped around the outside... | 01/07/2003 |
| 6468809 | High efficiency magnetic sensor for magnetic particles A magnetic sensing element detects the presence of magnetic particles in a binding assay. The magnetic sensing element has at least one planar layer of electrically conductive ferromagnetic material that has an initial state in which the material has a ci... | 10/22/2002 |
| 6403032 | Assembly for dispensing sanitary agents into drains In assembly for dispensing agents into drains and the like, includes a retaining member having a perforate wall structure substantially surrounding and enclosing a quantity of a sanitizing agent therein. The retaining member is preferably flexible and tub... | 06/11/2002 |
| 6264901 | Space frame sterilizer door A door (18) for sealing the opening (14) to a walk-in steam sterilizer is formed from a stainless steel plate (50), sized to cover the opening, and a load-bearing framework (52), which is formed from a material having a different coefficient of thermal ex... | 07/24/2001 |
| 6162407 | Chemical dispenser and method of dispensing chemical A chemical dispenser for dispensing chemicals into a tank holding liquid, such as a swimming pool. The chemical dispenser has a housing, a lid, an inlet and an outlet. The lid is selectively attachable to the housing to permit a sanitizing chemical to be ... | 12/19/2000 |
| 6117316 | Apparatus for treating water An apparatus for treating a stream of tap water flowing from the outlet of a fire hydrant comprises a T-shaped diffuser is combination with a frame having a pair of screens extending transverse with respect to outlets of the diffuser. A mesh bag containin... | 09/12/2000 |
| 6083465 | Method and apparatus for continuously calcining gypsum An apparatus for continuously calcining gypsum includes a flash calcining impact mill, a feed bin adjacent the impact mill for holding gypsum, and a gypsum feed control mechanism for supplying gypsum from the feed bin to the impact mill at a substantially... | 07/04/2000 |
| 6077484 | Tablet feeder for water and/or wastewater A low/intermediate/high flow tablet feeder is provided for the controlled dissolution of a solid treating agent in flowing liquid, such as water or wastewater. The tablet feeder includes a bottom wall which is contoured to define first, second and third f... | 06/20/2000 |
| 5979300 | Starter culture receptacle and methods using the same A receptacle for a fermented milk product starter culture is disclosed. The receptacle allows a single batch of starter culture to be transferred from one quantity of fermented milk to a fresh quantity of milk for formation of additional fermented milk pr... | 11/09/1999 |
| 5932093 | Chlorine dispenser The present invention relates to a new and improved chlorine dispenser including a substantially cylindrical housing having a closed bottom and an open top in communication with an interior chamber. A pair of diametrically opposed apertures are disposed a... | 08/03/1999 |
| 5885446 | Wastewater treatment system for loading tablets into wastewater conduit A wastewater treatment system for treating wastewater effluent flowing through a sewer pipe from a sewage treatment plant, and specially designed chlorine tablets for use in the treatment system. In a preferred embodiment the wastewater treatment system i... | 03/23/1999 |
| 5747351 | Immunochemical-based test device with lift and twist specimen full tab A chromatographic assay test device for use with immunoassays. The test device has a sample collection member pivotally coupled to a test strip receiving member. The sample collection member has a window for applying a test sample to a pad accessible thro... | 05/05/1998 |
| 5713967 | Apparatus for the extraction of peat An apparatus for the extraction of peat comprising an outer tank (1) and an inner tank compartment (3) having perforated walls (4,23) and being the actual container for peat to be extracted. Feeding pipes (13) for the supply of extracting medium extend in... | 02/03/1998 |
| 5601184 | Method and apparatus for use in photochemically oxidizing gaseous volatile or semi-volatile organic compounds An apparatus for photochemically oxidizing gaseous volatile or semi-volatile organic compounds includes: a) a reactor vessel having a plurality of reaction chambers provided therein, the reaction chambers having respective chamber lining sidewalls; b) a s... | 02/11/1997 |
| 5585046 | Column for performing thermal separations and/or chemical reactions A column for performing thermal separations includes a vertical cylindrical outer column wall defining an inner volume which is subdivided by a separating wall into two halves filled with mass exchange packs, each of the mass packs has horizontal strip-li... | 12/17/1996 |
| 5580448 | Chemical dispenser A device for delivering chemical solutions into a liquid flow, where said chemical solution is created by dissolving solid chemical contained within a chemical cartridge, the device comprising a base member and housing connected into a fluid flow line suc... | 12/03/1996 |
| 5569331 | Method and apparatus for recycling oil-soaked boom and pads A method and apparatus are provided for removing oil from absorbent materials of the type used in components for absorbing oil and containing oil spills. The components are first passed through a press to squeeze some of the oil from the components. The c... | 10/29/1996 |
| 5536479 | Solubilizing apparatus A solubilizing apparatus includes a fluid permeable sleeve having opposed openings therein wherein a spray nozzle is in flow communication with one opening and a second opening is disposed to receive solids. The spray nozzle is designed to spray a fluid i... | 07/16/1996 |
| 5512175 | Assembly for removing hydrophilic contaminants, method of the same, and apparatus for producing phenol An assembly for removing hydrophilic contaminants and a method of removing hydrophilic contaminants such as sodium included in an oil-state liquid using the removing assembly, which is able to remove positively the hydrophilic contaminants such as the sod... | 04/30/1996 |
| 5489415 | Urinal block dispenser assembly and composition The present invention relates to an improved urinal block composition comprised of fluid-soluble chemical components, and an improved dispenser to be used with that urinal block. Specifically, the present invention is directed to a unique combination of c... | 02/06/1996 |
| 5484578 | Two-phase distributor system for downflow reactors A distributor system for uniformly directing vapor and liquid across the surface of a fixed bed of solids in a downflow reactor comprising a distributor tray, and a plurality of open-ended downpipes extending through the tray. A first array of the downpip... | 01/16/1996 |
| 5393502 | Solubilizing apparatus A solubilizing apparatus includes a fluid permeable sleeve having opposed openings therein wherein a spray nozzle is in flow communication with one opening and a second opening is disposed to receive solids. The spray nozzle is designed to spray a fluid i... | 02/28/1995 |
| 5389345 | Swimming pool accessories A water treatment pill is disclosed having a cylindrical periphery and disklike end faces and comprising material that in use is eroded to treat the water. The cylindrical periphery of the pill is covered with a cover of water impermeable material to prev... | 02/14/1995 |
| 5194230 | Solid product static brake for solid block chemical dispensers A solid product static brake (10) is provided which is employed in cast solid chemical block dispensing systems for slowing a generally downward gravitationally driven movement of the solid chemical block when placed or installed in a chemical dispenser. ... | 03/16/1993 |
| 5186912 | Controlled release dishwasher detergent dispenser A dispenser (10) and method for washing dishes and utensils in a dishwashing machine are disclosed. The dispenser (10) is comprised of a container (11) and lid (12), the dispenser containing a solid detergent composition (13). A slot (23) in a side wall (... | 02/16/1993 |
| 5181533 | Controlled dispenser A controllable dispenser which dispenses an aqueous solution of a soluble substance. The dispenser has an inlet to accept a supply of water and an outlet to discharge the solution. The dispenser includes a container having a chamber, where the soluble sub... | 01/26/1993 |
| 5153015 | Decaffeinating coffee and tea A process and apparatus for extracting ingredient substances from natural products by means of a pressurized fluid, particularly for decaffeinating tea leaves by means of carbon dioxide, wherein the ingredient substances are bound by an adsorbent, prefera... | 10/06/1992 |
| 5147615 | Method of dispensing and dispenser therefor Method and apparatus for dispensing detergent from within a container comprises directing a water spray transversely of the container vertical orientation to dissolve and remove detergent in solution from the container. The transverse direction of water s... | 09/15/1992 |
| 5089127 | Chemical feed apparatus A chemical feeder having a collection reservoir and an erosion reservoir located within and spaced from the wall of the collection reservoir. An elongated cylinder is supported on the collection reservoir and the lower end of the cylinder is located in th... | 02/18/1992 |
