Composite door structure

Claim 1

A COMPOSITE DOOR COMPRISING: (A) A PAIR OF PANES OF TRANSPARENT SHEET MATERIAL POSITIONED TO ALIGNMENT WITH EACH OTHER; (B) SPACER MEANS BETWEEN SAID PANES MAINTAINING THEM A PREDETERMINED DISTANCE APART; (C) A PLURALITY OF CLAMPS SPACED AROUND THE EDGES OF SAID PANES AND COOPERATING WITH SAID SPACER MEANS TO HOLD SAID PANES STATIONARY RELATIVE TO EACH OTHER AS A UNITARY WINDOW ASSEMBLY; (D) A FRONT DOOR SECTION HAVING A WINDOW OPENING; (E) A BACK DOOR SECTION HAVING A WINDOW OPENING, SAID WINDOW OPENINGS BEING IN ALIGNMENT WITH EACH OTHER, SAID SECTIONS BEING SPACED APART; (F) A SEALING STRIP OF ELASTOMERIC MATERIAL SECURED TO SAID BACK DOOR SECTION AROUND THE OPENING THEREOF ON THE SIDE FACING SAID FRONT DOOR SECTION; (G) FIRST FASTENING MEANS SECURED TO SAID WINDOW ASSEMBLY AT A PLURALITY OF LOCATIONS AROUND THE EDGES THEREOF; (H) SECOND FASTENING MEANS SECURED TO THE BACK DOOR SECTION IN COOPERATIVE RELATION TO SAID FIRST FASTENING MEANS TO SECURELY FASTEN SAID WINDOW ASSEMBLY TO SAID BACK DOOR SECTION AT SAID LOCATIONS WITH ONE OF SAID PANES SNUG AGAINST SAID SEALING STRIP; AND (I) COOPERATING THIRD AND FOURTH FASTENING MEANS ON SAID FRONT AND BACK DOOR SECTIONS HOLDING THEM TOGETHER WITH SAID WINDOW ASSEMBLY SECURED TO SAID BACK DOOR SECTION BETWEEN SAID SECTIONS.