Multi-compartment envelope

Claim 1

AN ENVELOPE HAVING A RECTANGULAR FRONT PANEL WITH AN ADDRESSEE WINDOW THEREIN AND SCORE LINES ALONG THE PERIMETER THEREOF; SIDE PANELS ADJACENT EACH SIDE OF THE FRONT PANEL AND INTEGRALLY JOINED THERETO ALONG THE SCORE LINES FOR FOLDING OVER THE FRONT PANEL TO FORM A MAIN COMPARTMENT THEREWITH; A REAR PANEL HAVING A WINDOW ADJACENT ONE SIDE THEREOF, SAID REAR PANEL DISPOSED ALONG THE LOWEREDGE OF SAID FRONT PANEL AND INTEGRALLY JOINED THERETO ALONG A SCORE LNE FOR FOLDING OVER SAID SIDE PANELS TO FORM THEREWITH A SECOND COMPARTMENT REARWARD OF SAID MAIN COMPARTMENT; A PROTECTIVE LINER BONDED SUBSTANTUALLY COEXTENSIVE OVER THE INNER SURFACE OF SAID FRONT AND REAR PANELS FOR COVERING THE RESPECTIVE WINDOWS OF SAID FRONT AND REAR PANELS AND FOR FORMING A PROTECTIVE LINER ON ONE SURFACE OF THE MAIN AND SECOND COMPARTMENTS; A RECTANGULAR ADHESIVE AREA AND A VERTICAL ADHESIVE AREA DISPOSED ON THE OUTER SURFACES OFF SAID SIDE PANELS FOR SECURING SAID REAR PANEL WHEN THE SAME IS FOLDED OVER SAID SIDE PANELS, THE RECTANGULAR AND VERTICAL ADHESIVE AREAS BEING SPACED APART TO PROVIDE A NON-ADHESIVE AREA IN REGISTRY WITH THE WINDOW OF SAID REAR PANEL FOR FORMING THE SECOND COMPARTMENT WHEN SAID REAR PANEL IS FOLDED OVER SAID SIDE PANELS; AND A CLOSURE PANEL INTEGRALLY JOINED TO THE TOP OF SAID FRONT PANEL ALONG ONE OF THE SCORE LINES FOR SEALING SAID ENVELOPE CLOSED.