Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Roddis Plywood Corp
Original Assignee
Roddis Plywood Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Roddis Plywood CorpfiledCriticalRoddis Plywood Corp
Priority to ES0234669ApriorityCriticalpatent/ES234669A1/en
Publication of ES234669A1publicationCriticalpatent/ES234669A1/en
A fire-resistant door, comprising: a hollow rectangular frame that is made of chemically treated wood to make it fire-resistant a core within said frame that is composed of a plurality of rectangular blocks fitted together and in said frame, each composite being composed one of said blocks of wooden slits of various sizes treated with a non-combustible material and joined together by a thermoset adhesive, the slits being adjacent to one face of each block smaller than the slits that are adjacent to the other face of the block said blocks being arranged in the core with half the faces of thin slits thereof on one face of the core and the other half of the faces of thin slits on the other face of the core and a coating of plywood secured to the core and to the frame on each side of the door. (Machine-translation by Google Translate, not legally binding)
ES0234669A1957-04-041957-04-04Construction of fire proof door (Machine-translation by Google Translate, not legally binding)
ExpiredES234669A1
(en)