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Reward Candy Dispenser for Personal Computers
A personal computer peripheral, battery powered reward candy dispenser which immediately presents students with a single candy for each problem completed correctly.
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| Number | Title | Issue Date |
| 5240844 | Test kit for determining the presence of organic materials and method of utilizing same A test card incorporates a colorimetric indicator test to determine the presence of a minute amount of a specific substance in a liquid medium. The test card includes top and bottom sheets adhesively secured to an intermediate frame member which, together... | 08/31/1993 |
| 5114914 | Fabrication of high temperature superconductors An improved method for producing high temperature superconductors comprising sintering ceramic superconductor material in a sealed confinement chamber made of non-reactive impervious material, thereby preventing loss of oxygen from the material during hea... | 05/19/1992 |
| 5047061 | Prosthesis holder An improved prosthesis holder for retaining a prosthesis in the desired position with respect to the femoral canal of a femur during surgery. The holder comprises a holding unit member specially adapted for positioning in cooperative association with the ... | 09/10/1991 |
| 5021374 | Dead-burned magnesite and magnesia-alumina spinel refractory composition A refractory composition for forming shaped refractories comprising from about 60 to 85% by weight of a dead-burned magnesite and, correspondingly, about 15 to 40% by weight of a magnesia-alumina spinel grain; said refractory having a total lime and silic... | 06/04/1991 |
| 5019444 | Polyvinylidene fluoride products with a surface adapted to adhere to an incompatible polymer and process for treating the surface of a polyvinylidene fluoride material to enable it to adhere to an incompatible polymer A polyvinylidene fluoride product having at least one surface with improved adhesion to an incompatible polymer, said at least one surface covered with a porous polyvinylidene fluoride layer adhered thereto without a bonding intermediate, the process of f... | 05/28/1991 |
| 5017612 | Preservative composition and method A composition capable of preserving moisture-containing agriculture products succeptible to mold spoilage from mold spoilage for an extended period of time comprising a mold-inhibiting agent, a quaternary ammonium compound, and a polyglycol and the method... | 05/21/1991 |
| 5009919 | Finger-printing systems & method A fingerprinting system comprising means capable of releasably retaining a liquid and a liquid composition releasably retained in said means, said liquid composition comprising a leuco chromogenic compound and an oleophilic solvent therefor, and a substra... | 04/23/1991 |
| 5007615 | Refractory slide gate assembly and method A slide gate assembly for use with a metal-working vessel comprising at least one stationary refractory plate and at least one sliding refractory plate slidably engaged with said stationary plate, said refractory plates each having at least one passage th... | 04/16/1991 |
| 5006602 | Polyvinylidene fluoride compositions and products made therefrom A composition consisting essentially of a polyvinylidene fluoride polymer or copolymer having distributed substantially uniformly therethrough elastomeric particles, said elastomer being capable of absorbing hydrocarbons and fixing them in the composition... | 04/09/1991 |
| 5002785 | Method of making encapsulated food products An encapsulated food product consisting essentially of a solid comestible completely coated with a substantially uniform outer shell of an edible polymer of a type and of a thickness sufficient to prevent the diffusion of flavor and/or color elements from... | 03/26/1991 |
| 4999325 | Rebonded fused brick A rebonded, fused brick resulting from burning a mix consisting essentially of a fused magnesite chrome grain, a fused chrome-magnesite grain or mixtures thereof, and a chrome ore having a Cr2 O3 /(Al2 O3 +Fe | 03/12/1991 |
| 4998915 | Aspirating device A hand-held aspirating device comprising a main housing having a handle and a barrel, said barrel having a front end and a rear portion, said handle having a lower end and an upper end communicating with said rear portion of said barrel; actuating means e... | 03/12/1991 |
| 4993692 | Unitary tundish linings with flow-control devices A tundish consisting essentially of a rigid metallic outer casing having walls and a bottom at least one permanent layer of heat insulating material adjacent said casing, and a unitary, integrally formed expendable inner lining made of a hydrocarbon-free ... | 02/19/1991 |
| 4994023 | Electrochemical drug release and article An electrochemical drug release article containing an electrically conducting self-doped carbazole polymer of the formula: ##STR1## wherein A is a bifunctional molecule capable of bonding to a positively charged molecule at one end and is capable of ... | 02/19/1991 |
| 4992397 | Low thermal conductivity, high strength refractory castable composition with high abrasion resistance A low thermal conductivity, high strength refractory castable composition with high abrasion resistance consisting essentially of about 55 to 80% by weight amorphous silica, about 5 to 25% by weight of a calcined alumino-silicate aggregate having a densit... | 02/12/1991 |
| 4989838 | Metallurgical treatment lance A lance adapted for metallurgical treatment comprising an elongated tube-shaped member having a refractory coating thereon and a sleeve of carbon bonded refractory fitted about the tube-shaped member at the slagline to protect the slagline region thereof.... | 02/05/1991 |
| 4990406 | Surface coating based on fluoro terpolymers and acrylic resins and resultant products A composition for lining or coating surfaces, comprising at least one fluoro terpolymer and at least one acrylic resin, said fluoro terpolymer consisting essentially of, on a molar basis, of: (a) 70 to 85% of units derived from vinylidene fluoride, (b) 10... | 02/05/1991 |
| 4986727 | Pressure-operated oil and gas well swabbing device An oil well swabbing device having a pressure activated valve for use in closing a fluid passage therein when the swabbing device is submerged under liquid in a well casing corresponding to a predetermined valve closing pressure; the pressure-activated va... | 01/22/1991 |
| 4984361 | Method of making a flat spring compressor valve A sealing apparatus for use in a compressor suction or pressure plate valve having a seat member with a plurality of fluid passage ports therethrough. The sealing apparatus comprises a movable plastic plate member having a like plurality of sealing member... | 01/15/1991 |
| 4985761 | Current detection circuit and method An apparatus for sensing operational status of a system including a television set includes a reference source, means for determining a level of operation of the system, and means for comparing the level of operation of the system to the reference source.... | 01/15/1991 |
| 4983260 | Process for concentrating aqueous ethylene oxide solutions A process for the concentration of ethylene oxide in an impure solution thereof including adding the solution and steam to a distillation column, recovering the gaseous stream therefrom containing ethylene oxide, and progressively condensing the steamed s... | 01/08/1991 |
| 4980826 | Voice actuated automated futures trading exchange A computerized open outcry exchange system for transacting sales of a particular futures commodity contract by members of a futures trading exchange wherein bids to purchase or offers to sell the particular contract are made orally by the members through ... | 12/25/1990 |
| 4980438 | Oligomer derived from a polyetaoxylated fatty amine, process for producing same, and its use to modify the surface properties of polymers An oligomer of the formula ##STR1## in which R1 =H or CH3 ; R2 =Ct H2t in which 0ࣘtࣘ18; Z is selected from C2 H4, C2H2 and ##STR2## in which 2ࣘdࣘ16; m is an integer... | 12/25/1990 |
| 4966984 | Process for the cyclization of orthobenzoylbenzoic acid The process for the cyclization of orthobenzoylbenzoic acid into anthraquinone comprising heating orthobenzoylbenzoic acid in the solid phase at a temperature between about 300° C. to 400° C. in the presence of a superactive bleaching earth. The inventi... | 10/30/1990 |
| 4966657 | Process for separating ethylene oxide from aldehyde impurities by distillation An improved process for separating ethylene-oxide from formaldehyde and acetaldehyde in contaminated ethylene oxide, the process involves introducing the contaminated ethylene oxide into a reflux column and distilling the contaminated ethylene oxide under... | 10/30/1990 |
| 4961892 | Device for extruding homogeneous plastic articles and process manufacturing homogeneous articles therewith A distribution head having an inlet for accepting a stream of fluid plastic and an outlet for discharging the stream, two pairs of discrete channels in the distribution head extending from the input to the output for splitting the streams into correspondi... | 10/09/1990 |
| 4960744 | Catalyst system for the polymerization of propylene and process A catalyst composition for the polymerization of propylene comprising a catalytic solid comprising a titanium halide and a magnesium halide and isoprenyl aluminum associated therewith and the process of polymerizing propylene using such catalyst.... | 10/02/1990 |
| 4957555 | Cementing compositions and method A cementing composition for forming a low density cement slurry comprising a hydraulic cement and shot coke.... | 09/18/1990 |
| 4957887 | Magnesite-carbon refractories A mix for forming a carbon-bonded refractory comprising from about 8 to 30 wt. % of a high purity carbon, about 0.1 to 1 wt. % of aluminum metal, magnesium metal, or a mixture thereof, and the balance a high purity magnesite, and for each 100 wt. % of sai... | 09/18/1990 |
| 4956120 | Polyarylalkane oligomer compositions and process for their manufacture Polyarylalkane oligomer compositions containing essentially of a mixture of isomers of benzylcumene and its higher homologues and a mixture of isomers of bis(isopropylphenyl)phenylmethane; the method of making such compositions by first reacting chlorine ... | 09/11/1990 |
| 4954463 | Magnesium aluminate spinel refractory A refractory mix for forming an in situ magnesium aluminate spinel brick consisting essentially of about 65 to 95 wt. % magnesite having an MgO content of at least about 92 wt. % and, correspondingly, about 35 to 1 wt. % calcined bauxite having an alumina... | 09/04/1990 |
| 4953482 | Mulching and seeding apparatus and method with film severing and covering An agricultural machine and method for applying and securing a plastic film onto a seed bed. The machine includes a cutter that severs the plastic film at the end of a row or other area for which covering is desired, while covering the severed ends so as ... | 09/04/1990 |
| 4948872 | Process for spray drying of vinyl chloride homopolymers and copolymers A process for the preparation of vinyl chloride homopolymer and copolymer pulverulent powders suitable for the preparation of plastisols with improved rheological properties, comprising polymerizing to form a vinyl chloride homopolymer or copolymer latex ... | 08/14/1990 |
| 4948912 | Alkylating agents and method of use thereof The present invention comprises a haloacetoxyalkyl ether having the formula: ##STR1## wherein R is H or a C1 -C4 substituted or unsubstituted alkyl group, R' is H or a C1 -C3 group, and X is chlorine or flu... | 08/14/1990 |
| 4943525 | Simultaneous immunoassay for the determination of antigens and antibodies An immunochemical assay to determine the presence or concentration of antigen or antibodies in a fluid, comprising: (a) forming a ternary complex of a first labelled antibody or antigen, a second labelled antibody or antigen, and the antigen or antibody t... | 07/24/1990 |
| 4942986 | Pressurized tundish for controlling a continuous flow of molten metal A pressurized tundish for controlling a continous flow of molten metal characterized by having a pair of principal compartments, one being essentially unpressurized and receiving molten metal introduced thereto, and the other being adapted for maintaining... | 07/24/1990 |
| 4942070 | Extruded conduits and method of making the same An extruded thermoplastic polymer conduit having a conduit wall of substantially uniform crystalline morphology through the entire thickness thereof free of any oriented surface zone and the process of making such conduits.... | 07/17/1990 |
| 4938927 | Rotary fluid manipulator A rotary fluid manipulator utilizable as a diagnostic device includes a porous body having fluid passages defined therein by fluid blocking means in the porosities of the body such as openings or slots in the body or compaction of areas of the porous body... | 07/03/1990 |
| 4937383 | Process for manufacturing amines from olefins A process for the manufacture of amines by reacting at an elevated temperature an olefin selected from a monoolefin, the alcohol corresponding to its hydration, or a mixture of the monoolefin and the alcohol with ammonia or a primary or secondary amine in... | 06/26/1990 |
| 4935546 | Process for the production of long chain alkylamines and dimethylalkylamines and catalysts therefor catalysts therefor A process for the production of a primary alkylamine or a dimethylalkylamine in a single stage comprising heating a reaction medium comprising a long chain carboxylic acid ester with ammonia and hydrogen in the presence of a mixed catalyst of the oxide-me... | 06/19/1990 |
