U.S. patents available from 1976 to present.
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Patent No. 5508049

Pizza Pie With Concentric Rings of Crust

A pizza mold for forming a plurality of concentric raised ridges of dough (i.e., crust) on the surface of a pizza pie.

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Lithgow, Thomas M.


Primary examiner statistics: 1103 patents; average approval time: 1102 days
Assistant examiner statistics: 322 patents; average approval time: 599 days

Patents as Primary Examiner

1                      
NumberTitleIssue Date
7462278Hose clasp for a pool cleaner filter bag
An improved hose clasp for supporting a filter bag in a generally upright orientation on a pool cleaner as disclosed, for example, in U.S. Pat. Nos. 5,863,425; 4,558,479; and 3,822,754. The hose clasp includes a generally cylindrical split collar having separable fr...
12/09/2008
7461745Flotation of sulfide mineral species with oils
This invention is directed to the use of non-sulfur containing compounds as collectors in the froth flotation of certain mineral sulfide and metallic compounds. These non-sulfur-containing compounds may be from natural sources, such as vegetable oils, or synthesized...
12/09/2008
7458467Stator for a flotation cell
The invention relates to a stator for a flotation cell to be used in the flotation of slurry-like material, such as ore and concentrate containing valuable minerals, by means of which stator the orientation of the slurry flow created by the flotation cell rotor can ...
12/02/2008
7459078Filter device
A filter device includes at least one filtering element arrangeable in a filter housing (11) connectable to a hydraulic device (9), in particular a hydraulic tank. The tank is connectable to the filter housing through hydraulic connections (37, 39
12/02/2008
7445710Filtration module including unitary filter cartridge-bowl construction
A filtration module is provided which includes a manifold (100), a filtration cartridge (104) and a bowl (102) that houses the filter cartridge. The filtration cartridge and bowl are connected to each other to form a unitary construction. The fi...
11/04/2008
7445709Installation for treating water by floatation
The invention relates to an installation for treating water by flotation, said installation comprising flotation equipment consisting of a flotation cell (10) into which flocculated raw water mixed with micro-bubbles produced by a pressurization-depressurizat...
11/04/2008
7445708Plant for purifying water contaminated by droplets of hydrocarbonaceous liquid
A unit for purifying water contaminated by droplets of hydrocarbonaceous liquid has an essentially vertically positioned filter, an inlet chamber for the contaminated water that is partially defined by a first vertical surface of the filter, supply means for contami...
11/04/2008
7442300Filter installation for liquids
Filter installation for liquids, including a basin with at least one closable suction opening, and a filter, which has a filter element and, from a removal position above the liquid can be lowered in a straight line to an operating position assigned to the suction o...
10/28/2008
7441662Stator for a flotation cell
The invention relates to a stator for a flotation cell to be used in the flotation of slurry-like material, such as ore and concentrate containing valuable minerals, said stator including flow regulators installed at regular distances from each other. The stator flo...
10/28/2008
7442301Filter housing apparatus with rotating filter replacement mechanism
A filter assembly for fluid filtration having a push-activated lock and release mechanism. The filter housing has a sump for enclosing the filter media, a filter head, and at least one standoff protruding outwards for use in securing the filter head to a filter mani...
10/28/2008
7438808Sand catcher
The invention relates to a sand catcher comprising a deposition chamber (1) that is configured as a steel container with a cylindrical cross-section, traversed in a longitudinal direction. Said deposition chamber comprises air-supply nozzles (4) on one...
10/21/2008
7438189Bituminous froth inclined plate separator and hydrocarbon cyclone treatment process
An apparatus for separating bitumen from a bitumen froth output of a oil sands hot water extraction process comprises an inclined plate separator (IPS) for providing a first bitumen separation stage and a cyclone for providing a second bitumen separation stage. The ...
10/21/2008
7438807Bituminous froth inclined plate separator and hydrocarbon cyclone treatment process
Discloses apparatus to perform a process to remove water and minerals from a bitumen froth output of a oil sands hot water extraction process. A bitumen froth feed stream is diluted with a solvent and supplied to a primary inclined plate separator stage, which separ...
10/21/2008
7438809Single-cell mechanical flotation system
A mechanical flotation system having only one cell may be nearly as efficient as one having two or more cells, yet provide an apparatus with a considerably smaller footprint, significantly reduced capital and operating costs, as well as be resistant to floating oil ...
10/21/2008
7438810Sieve device
A sieve device for insertion in a shaft has a connection for wastewater arriving in a supply device, which supply device is connected to a sieve surface of the sieve device for separating material to be separated from the wastewater. A worm conveyor transports the m...
10/21/2008
7438811Water purification apparatus
A water purification apparatus includes a main body having an accommodation chamber inside and a plate on a top side thereof, a lid pivotally mounted on the main body and closable on the main body, a holder mounted with the plate of main body and defining with the p...
10/21/2008
7435346Strengthening construction for depressing cap of water filter
Disclosed is a strengthening construction for depressing cap of water filter, said depressing cap has a water inlet and a water exit, a pipe line which does not form a via hole for connecting said water inlet and water exit is formed between said water inlet and wat...
10/14/2008
7435351Filter apparatus backwash removal device and backwash removal method
A filter media backwash removal method and device for transporting backwash fluid and solids away from re-entering a housing containing circulating filter media. ...
10/14/2008
7435345Element replacement type filter
An element replacement type filter accommodates an element assembly that includes a filter element within a casing formed from a first casing member and a second casing member which are mutually screwable by relative rotation, and provides an anti-loosening mechanis...
10/14/2008
7435344Device for separating impurities from liquids
A device for separating impurities from liquids has at least one separating container for separating impurities from a liquid/impurities mixture flowing in a flow direction through the at least one separating container. A partition divides the interior of the at lea...
10/14/2008
7435347Filter device and parts thereof and a method for operating of the filter device
A filter device has a filter housing part (10) with a filter element (12) and can be detachably connected to another filter housing part (20). A valve (24) clears a fluid path in the interconnected state of the housing parts (10, 20
10/14/2008
7431165Liquid/solids waste separator
A liquid/solids waste separator apparatus for use in separating animal waste or waste water into filtered liquid and collected solid particles. It has an elongated housing having a pair of support legs attached to the rear end of the housing for varying the inclinat...
10/07/2008
7427355Water treatment unit for bottle or pitcher
A water treatment unit for positioning in a sport bottle or container for treating water includes a prefilter section, a pretreatment section, a treatment section and a post treatment section. A first chamber in the pretreatment section contains a first treatment me...
09/23/2008
7416664Water-conditioning cartridge
A water-conditioning cartridge has a housing that encloses an ion exchanger and can be screwed via a screw thread onto a cartridge-connecting fitting. The cartridge is provided with a water inlet for admission of untreated water, especially from a water-supply syste...
08/26/2008
7416670Dual-cell mechanical flotation system with intermittent skimming
It has been discovered that a mechanical flotation system (10) having only two cells (18, 20) can be nearly as efficient as one having more cells, yet provide an apparatus with a considerably smaller footprint, significantly reduced capital and operati...
08/26/2008
7416661Mechanical flotation device for reduction of oil, alkalinity and undesirable gases
A mechanical vessel may effectively and simultaneously displace a first undesired gas from within water with a second desired gas, and remove at least one alkaline species and oily matter from the water. The vessel raises the pH of the water and reduces the lime req...
08/26/2008
7413668Quick change filter and bracket system with key system and universal key option
A bracket system holds a filter(s) in quick-attach and quick-release fashion. Brackets are combined in modular fashion, with conduit between the brackets, to create a “bank” of filters easily changed in number, arrangement, and flow scheme. Top brackets and bott...
08/19/2008
7404894Portable water cleaner
A carrying case (1) of a portable water cleaner includes a case main body (2) having an opening portion (2a) and forming a container (2b) that contains water, and a lid member (3) that opens/closes the opening portion...
07/29/2008
7404895Filter apparatus for separating particles from a liquid
A filter apparatus for separating particles from a liquid having a tank with a feed inlet, a gravitational settling zone and a filtration zone arranged downstream of the settling zone. Inside the tank are two transversely spaced-apart endless chains with transversel...
07/29/2008
7402244Portable water filtering assembly
A portable water filtering assembly includes a soft bag which is composed of a first part and a second part. At least one holding member is connected to an inside of at least one of the first and second parts so as to hold a water filtering device. The water filteri...
07/22/2008
7398886Press for dewatering a humid substance, in particular residual refuse
A press for the dehumidification of humid matter, in particular of residual waste is disclosed, which comprises a worm gear whereby the residual waste may be compressed mechanically. During transport with the aid of the worm gear, the humid matter is subjected to a ...
07/15/2008
7393462Process and reagent for separating finely divided titaniferrous impurities from Kaolin
A mineral beneficiating reagent containing an alkyl hydroxamic acid or salt thereof and a nonionic surfactant. The alkyl hydroxamic acid or a salt thereof is represented by the formula: R—C(═O)N(R″)—OM, wherein R is linear or branched C2-...
07/01/2008
7390407Liquid filter
A liquid filter, in particular for the lubricating oil of an internal combustion engine, having a housing with an inlet and an outlet formed from a housing pot having a substantially downwardly open filter element installation opening and a screw-on cover that close...
06/24/2008
7389881Flotation
A method of recovering a valuable component from a feed slurry in minerals processing plant for a mined material is disclosed. The method includes separating the feed slurry on the basis of particle size into at least two streams, of which one stream is a fines stre...
06/24/2008
7390406Fluid treatment system and radiation sources module for use therein
A radiation source module comprising a support member, a radiation source assembly connected to the support member and a seal disposed on a first surface of the module, the seal operable to provide a substantially fluid tight seal between the first surface and a sec...
06/24/2008
7387725One-touch fitting type single or multiple adapter, filter assembly detachably engaged with the same and water purifying system employing these elements
A one-touch fitting type adapter and a filter assembly are provided in which the filter assembly used for machinery, such as a bidet or a refrigerator, is easily assembled with or disassembled from the adapter through a one-touch fitting manner such that the filter ...
06/17/2008
7387726Liquid filter system
An oil filter for an internal combustion engine with a cup-shaped housing that is releasably connectable to a receiving head. The housing has a first interlocking element that extends across at least a portion of the outer circumference of the housing and is interru...
06/17/2008
7384547Replaceable filter element with integral annular trap
The replaceable, outside-in flow filter element with integral annular trap provides a simple, efficient, tubular filter element that combines the advantages of inside out-flow and outside-in flow filters. The element includes end caps with pleated filter media exten...
06/10/2008
7378017Disposable fluid separation device and manifold assembly design with easy change-out feature
Fluid separation assembly that allows easy and fast change-out even in confined spaces, and also minimizes or eliminates leakage during change-out. A fluid separation unit having a housing containing separation means, the housing having an inlet and an outlet spaced...
05/27/2008
7374689System and method of gas energy management for particle flotation and separation
A system for separating particles from a contaminated liquid stream includes an apparatus for mixing the liquid with one or more separation enhancement additives and gases. A pressure reducing device having a flow restrictor element within an enlarged tube receives ...
05/20/2008
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