Ski goggles
Patent 4290673 Issued on September 22, 1981. Estimated Expiration Date: 
January 29, 2000. 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.
January 29, 2000. 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 2539284 3377626 InventorAssigneeApplicationNo. 06/116598 filed on 01/29/1980US Classes:351/62, With moisture prevention or absorption2/437Via tortuous air pathExaminersPrimary: Corbin, John K.Assistant: Bovernick, Rodney B. Attorney, Agent or FirmInternational ClassesA61F 9/02 (20060101)G02C 11/00 (20060101) G02C 11/08 (20060101) Foreign Application Priority Data1979-05-14 JPAbstractSki goggles comprising a goggle frame, a rubber band and a plastics goggle lens composed of a pair of inner and outer lens plates and having a heat insulating interior space between the lens plates. The inner lens plate is formed with an air port at its one end close to the frame and provided with a water-repellent air-permeable filter opposed to the air port. The filter comprises an air-permeable backing sheet and a layer of ethylene tetrafluoride resin fibers. The filter can be housed in a filter frame with an air flow regulating valve accommodated in the filter frame. The air port may be provided, in place of the filter, with a bellows container or an elastic container serving as a pressure balancing container and disposed in the goggle frame. | |
