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Patent No. 5823386

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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Assignee: Dymax Corporation


Location: Torrington, CT
No. of patents: 30

NumberTitleIssue Date
8134132Exposure device having an array of light emitting diodes
A device and method for exposing light sensitive substrates to a concentrated light source. The device is suitable for curing substances such as photosensitive sensitive inks, adhesives, and photographic elements. Ultraviolet or visible light is emitted from an arra...
03/13/2012
8052829Photopolymerizable compositions containing an oxonol dye
The invention relates to photopolymerizable compositions containing an oxonol dye, which compositions cure by exposure to ultraviolet and/or visible radiation and whose visible color is substantially reduced during exposure. More particularly, the invention pertains...
11/08/2011
7892386Radiation-curable fluorescing compositions
The invention provides fluorescing compositions which cure by exposure to ultraviolet radiation and contain a europium compound which fluoresces at visible wavelengths. More particularly, the invention pertains to liquid, radiation-curable compositions comprising a ...
02/22/2011
7802910Light guide exposure device
The invention provides a light guide exposure device comprising light emitting diodes arranged in a single array defining an array width and a flexible light guide having a proximal end and a distal end; the proximal end defining a proximal end diameter. The array i...
09/28/2010
7691557Polymerizable composition exhibiting permanent color change as cure indicator
A polymerizable acrylate or epoxy composition includes a dye comprised of a conjugated system containing a chromophore that is subject to effective decoupling, by a reactive alkylating species generated by the polymerization initiator, to produce a permanent loss of...
04/06/2010
7671543Light exposure control device and apparatus
The invention provides a light exposure apparatus containing a light exposure control device for curing light sensitive adhesives. The light exposure apparatus includes a) a light source; b) a light transmitter for transmitting light from the light source; and c) a ...
03/02/2010
7001930Acrylic resin formulations curable to clear, heat-resistant bodies
A non-aqueous, solvent-free formulation for producing clear, transparent, heat-resistant elements, suitable for use as lenses in optoelectronic devices, consists essentially of an acidic, nonpolymerizing acrylic resin; THFA, DMA, HEMA, HBA, or an equivalent polymeri...
02/21/2006
6765037Photopolymerizable epoxy composition
A free radical-curable epoxy composition comprises epoxy resin and a copolymerizable material including a monomer having amide, acrylamide, or hydroxyl functionality, and is advantageously devoid of any cationic catalyst ingredient. ...
07/20/2004
6664307Low-shrinkage epoxy resin formulation
Low-shrinkage positioning formulations include, in addition to the resin-forming composition, a filler comprised of fibrous and spherical elements, usually of glass, present in a defined ratio and amount. The resin formulation may desirably comprise epoxy...
12/16/2003
6218446Radiation curable formulation for producing electrically conductive resinous material, method of use, and article produced
A radiation-curable formulation employs an electrically conductive primary filler, comprised of elements of elongate form and having surfaces that reflect the actinic radiation to which the photoinitiator employed is responsive, and a secondary filler tha...
04/17/2001
6169125Electrically conductive resinous material and radiation curable formulation for producing the same
A radiation-curable formulation employs an electrically conductive filler comprised of elements of elongate form, which elements have surfaces that reflect the actinic radiation to which the photoinitiator employed is responsive. Silver-coated cylindrical...
01/02/2001
6080450Composition exhibiting improved fluorescent response
The use of a phosphine oxide photoinitiator enables the effective curing of a polymerizable acrylate formulation despite the incorporation of a high concentration of a fluorescing agent, thereby facilitating, and enhancing the efficiency of, evaluation of...
06/27/2000
6008568Heatsinked lamp assembly
A reflector/lamp assembly employs a heat-sink component that includes a rigid, elongate, relatively wide and thin conductor element which is disposed forwardly of the reflector rim and extends radially to a distal point lying substantially beyond the axia...
12/28/1999
5728787Rapid curing, non-corroding adhesive composition, and method of use
The adhesive formulation minimizes corrosion of copper surfaces (e.g., of motor commutators) caused by volatile ingredients of conventional acrylate compositions, and cure speeds are significantly increased thereover....
03/17/1998
5712321Dual-curing coating formulation and method
The polymerizable acrylate formulation, and method utilizing the same, employ a catalyst system that includes a tertiary aromatic amine compound and an air-curing polyether-ene polymer, in a specified ratio, in combination with an acid ingredient and a tr...
01/27/1998
5703138Oxygen-curable coating composition
An acrylate composition, especially useful for producing conformal coatings on circuit board assemblies, includes a photoinitiator and an air-curing system, the latter being comprised of a compound having multiple allyloxy groups in its molecule and a tra...
12/30/1997
5677362Actinic radiation-curable formulation
An acrylate encapsulation formulation reacts at a high rate of speed, when exposed to radiation inclusive of wavelengths in the ultraviolet and the visible range, to initially produce a relatively thick skin and to ultimately cure to a relatively low-stre...
10/14/1997
5672393Coating method using actinic radiation-curable formulation
An acrylate encapsulation formulation reacts at a high rate of speed, when exposed to radiation inclusive of wave-lengths in the ultraviolet and the visible range, to initially produce a relatively thick skin and to ultimately cure to a relatively low-str...
09/30/1997
5512608Method for producing an adherent deposit using a chemically activated multi-part, solvent-free composition
A multi-part composition is provided which is suitable for use as an adhesive, a potting compound, a coating or a sealant. It consists of a polymerizable acrylate formulation and an activating formulation, the latter usually comprising an amine-aldehyde c...
04/30/1996
5393800Two-component coating formulation
A catalyst system for effecting polymerization in a two-part formulation, which contains an oxygen-containing ethylenically unsaturated monomer, consists of a selected acid, a selected aromatic amine compound, and a transition metal compound; active-oxyge...
02/28/1995
5388754Method utilizing water soluble masking formulation for producing an article
A water-soluble coating or other deposit is produced from a formulation that is comprised of a curable liquid substance and a dispersed, particulate effervescing agent. The formulation is particularly useful as a solder resist in the manufacture of PCBs, ...
02/14/1995
5387444Ultrasonic method for coating workpieces, preferably using two-part compositions
A system and method for effecting the continuous, in-line coating of workpieces, freely supported upon a conveyor, utilizes an ultrasonic spray unit for delivery of a photo-polymerizable coating material. The deposited liquid is immediately irradiated to ...
02/07/1995
5387800Prefocused lamp and reflector assembly
A prefocused lamp and reflector assembly comprises an elongated lamp having opposite end portions that extend through aligned openings in the wall defining the reflective cavity. The end portions of the lamp are engaged in receptacle portions on the base ...
02/07/1995
5385958Activator formulation and composition utilizing same
A multi-part composition is provided which is suitable for use as an adhesive, a potting compound, a coating or a sealant. It consists of a polymerizable acrylate formulation and an activating formulation, the latter usually comprising an amine-aldehyde c...
01/31/1995
5225315Water soluble formulation for masking and the like, and method utilizing the same
A water-soluble coating or other deposit is produced from a formulation that is comprised of a curable liquid substance and a dispersed particulate effervescing agent. The formulation is particularly useful as a solder resist in the manufacture of PCBs, a...
07/06/1993
5185196Method for assembly of laminate article
An activated oil formulation provides a surface layer upon the faces of a transformer coil stack, to which is subsequently applied a layer of a polymerizable liquid adhesive composition. The adhesive composition is curable by both chemically induced and p...
02/09/1993
5039715Photocurable acrylate adhesive containing perester/tautomeric acid adhesion promoter
A reactive acrylic adhesive, activated by actinic radiation, includes, in addition to a photoinitiator, at least about 1.0 percent by weight of a perester compound or cumene hydroperoxide, and 0.5 percent of a tautomeric organic acid, for enhanced bond st...
08/13/1991
4964938Bonding method using photocurable acrylate adhesive containing perester/tautomeric acid adhesion promoter
A reactive acrylic adhesive, activated by actinic radiation includes, in addition to a photoinitiator, at least about 1.0 percent by weight of a perester compound or cumene hydroperoxide, and 0.5 percent of a tautomeric organic acid, for enhanced bond str...
10/23/1990
4963220Adhesive system utilizing metal ion-containing activator
A composition providing a two-part adhesive consists of an acrylate monomer and perester catalyst, comprising the polymerizable part, and a ferric ion-accelerated butyraldehyde/aniline activator comprising the other....
10/16/1990
4819842Radiation supply and adhesive dispensing system
A system for dispensing a radiation-curable adhesive substance employs a shutter for controlling the period of irradiation. A hand-held assembly, remote from the control unit of the system, permits convenient placement and curing of the adhesive deposit u...
04/11/1989
 
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