Microencapsulated ant bait
Patent 4874611 Issued on October 17, 1989. Estimated Expiration Date: 
December 7, 2007. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
December 7, 2007. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 3160686 3310612 3389194 3464926 3780195 3917825 O,O,O',O'-Tetraethyl-S,S'-methylene-bis(p-phenylenethiomethylene) Stable water dispersions of encapsulated parathion Insect attractive compositions Process for production of roe-like multilayer spherical structure Inventors
ApplicationNo. 129503 filed on 12/07/1987US Classes:424/410, Impregnated or coated food or edible simulative of food (e.g., bait, poison, etc.)264/4.4, Solid-walled microcapsule formed by cooling molten materials424/84, BAITS, ATTRACTANTS, OR LURES (NON-FOOD)424/408, Capsule or pelleted or tablet424/455, Containing emulsions, dispersions, or solutions424/456, Gelatin424/492, Gelatin428/402.22Addition polymer from unsaturated monomers onlyExaminersPrimary: Lovering, Richard D.Attorney, Agent or FirmForeign Patent References
International ClassesA01N 025/08A01N 025/28 B01J 013/02 AbstractA method of manufacture and the product made thereby are set forth; in the preferred and illustrated embodiment, a core including an insect poison is encapsulated by shell material melting and hardening for encapsulation. The core is primarily soybean extract mixed with DURSBAN.RTM. insecticide, an example of a toxicant. The surrounding shell or encapsulation is formed by melt extrusion of shell material. The surrounding shell encloses the core material to form an impervious shell. The surrounding shell includes soy protein as an insect attractant mixed in gelatin or poly(vinyl alcohol). A gelling agent such as carrageenan and the attractant were added to the shell. The beads formed by the melt extrusion encapsulation has sufficient shell strength to enable mechanical handling for dispensing, are resistant to water, do not bleed from the inside to the outside, and yet can be penetrated by the insect.Other References
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