Ventilation pane assembly
Patent 5120273 Issued on June 9, 1992. Estimated Expiration Date: 
September 17, 2011. 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.
September 17, 2011. 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 487163 998421 1860648 1939312 2308262 2328761 2579099 InventorApplicationNo. 760943 filed on 09/17/1991US Classes:454/195, MEANS COMBINED WITH DOOR454/212, Having air passage means within, attaching to, or replacing pane454/277LouverExaminersPrimary: Joyce, HaroldAttorney, Agent or FirmInternational ClassF24F 013/18AbstractA ventilation pane assembly for making a panel door or window, comprising two hollowed face panels at two opposite sides, an intermediate frame at the middle, a fixed perforated panel fixedly set between said intermediate frame and one of said two hollowed face panels, and at least one movable perforated panel movable set between said intermediate frame and the other hollowed face panel. Moving the movable perforated panel in one direction causes the vent holes thereon to be aligned with the vent holes on the fixed perforated panel for ventilation; moving the movable perforated panel in the other direction causes the vent holes thereon to be deviated from the vent holes on the fixed perforated panel so that air current is stopped from passing through the ventilation pane assembly. | |
