Air freshener unit
Patent 4735626 Issued on April 5, 1988. Estimated Expiration Date: 
July 6, 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.
July 6, 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 Re27917 3336244 3450650 3491173 3688985 3730916 3876762 Process for a polyurethane foam containing fragrance Foam products Patent #: 4339550 InventorsAssigneeApplicationNo. 07/070247 filed on 07/06/1987US Classes:8/137, CLEANING OR LAUNDERING134/21, Including use of vacuum, suction, or inert atmosphere15/246.3, With treating means (e.g., deodorizing, sterilizing, etc.)512/4, Nonliquid or encapsulated521/55, Treating a cellular solid polymer by adding a material thereto which forms a composition therewith521/918, PHYSICAL AFTERTREATMENT OF A CELLULAR PRODUCT521/919SINTERED PRODUCTExaminersPrimary: Foelak, MortonAttorney, Agent or FirmInternational ClassesA61L 9/12 (20060101)A61L 9/04 (20060101) Foreign Application Priority Data1984-09-29 GBAbstractNew dynamic air freshener unit comprises a porous synthetic polymer support impregnated with a fragrance. The synthetic polymer support is one produced by:(a) bonding together small particles of solid polymer;(b) coagulating polymer solutions in a non-solvent for the polymer; or(c) expanding a thermoplastic or thermosetting plastic by means of a blowing agent; to form a porous body.The unit is especially useful in vacuum cleaners. | |
