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(11)    Patent No :    AP 1886    (73) Applicant(s)       
(21)    Application No :    AP/P/2005/003310    VISION-WALL CORPORATION, 17915-118 Avenue,       
            Edmonton, Alberta, Alberta T5S 1L6,       
                   
(22)    Filing Date :    13.11.2002    Canada       
(24)    Date of Grant &    20.09.2008           
                   
(45)    Publication :

(30)    Priority Data                    (72) Inventors   
    (33) Country    (31) Number    (32) Date    WINFIELD Alan H., Canada   
                                (74) Representative   
(84)    Designated State                   
                           
    BW    GM    GH    KE    LS    MW    MZ   NA   SL    HONEY & BLANCKENBERG   
    SD    SZ    T Z    UG    ZM    ZW               
(51)    International    Classification    E06B3/677 (2006.01)    E06B 3/58 (2006.01)   



(54)    Title

Energy efficient window.

(57)    Abstract

A heat insulating window includes a pair of outer glass panes (10, 12) held apart by spacing member (16) and surrounded by a frame. One frame member (26) serves as a dessicant concealing member which holds a removable dessicant cartridge (44). The dessicant cartridge connects to a conduit system (42) providing gas communication to the air space between the glass panes (10,12).


(56)    Documents Cited :    GB 1 160 380 A   EP 0 086 345 A

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