Insulated tank for liquids at low temperatures

Claim 1

A TANK FOR HOLDING GAS, SAID TANK COMPRISING AN OUTER WALL WHICH IS THE HULL OF A SHIP, AN INNER WALL, AND AN INTERMEDIATE WALL BETWEEN SAID INNER AND OUTER WALLS, A FRAMEWORK WITHIN AND CARRIED BY SAID OUTER WALL, SAID FRAMEWORK COMPRISING A GROUP OF ELONGATED OUTER MEMBERS CARRIED BY SAID OUTER WALL, A GROUP OF ELONGATED INTERMEDIATE MEMBERS CARRIED BY SAID ELONGATED OUTER MEMBERS AND A GROUP OF ELONGATED INNER MEMBERS CARRIED BY SAID INTERMEDIATE MEMBERS, SAID ELONGATED INTERMEDIATE MEMBERS BEING POSITIONED TRANSVERSELY WITH RESPECT TO THE INNER AND OUTER ELONGATED MEMBERS AND SAID ELONGATED INTERMEDIATE AND INNER MEMBERS BEING MOUNTED TO PERMIT EXPANSION AND CONTRACTION OF SAID INTERMEDIATE AND INNER MEMBERS RELATIVE TO EACH OTHER AND SAID OUTER MEMBERS, SAID INNER WALL BEING FASTENED TO SAID INNER ELONGATED MEMBERS, AND SAID INTERMEDIATE WALL BEING MOUNTED ON SAID FRAMEWORK TO PERMIT EXPANSION AND CONTRACTION OF SAID INTERMEDIATE WALL RELATIVE TO SAID INNER AND OUTER WALLS, AND INSULTION FILLED CONTAINERS POSITIONED BETWEEN SAID INNER AND INTERMEDIATE WALL AND BETWEEN SAID INTERMEDIATE AND OUTER WALLS.