Patent ID: 7434363

Claim:
An insulating cover, comprising: a top portion; and four sidewalls extending from said top portion, wherein said four sidewalls and said top portion have outer surfaces and inner surfaces, wherein the inner surfaces define a cavity having a cavity inner surface, wherein said four sidewalls have respective lengths parallel to the inner surfaces of respective ones of said four sidewalls and parallel to the inner surface of said top portion, wherein the cavity inner surface includes two depressions, wherein the two depressions are disposed in and extend into respective opposing two of said four sidewalls, wherein the two depressions have respective lengths parallel to the respective lengths of the opposing two of said four sidewalls, wherein the lengths of the two depressions are more than half of the lengths of the opposing two of said four sidewalls, said four sidewalls form obtuse angles with said top portion so that the cavity is smaller proximate to said top portion than distal from said top portion, wherein the outer surfaces of the opposing two of said four sidewalls include a respective two protuberances having respective lengths parallel to the respective lengths of the two depressions, wherein the lengths of the two protuberances are at least as great as the lengths of the two depressions, wherein the two protuberances are disposed at positions adjacent to the two depressions and opposite from the two depressions, resulting in a thickness of the opposing two of said four sidewalls being about the same in the vicinity of the two depressions as apart from the two depressions, wherein the insulating cover is configured to cover an attic side of the attic ceiling opening, wherein the two depressions each have a position, a size, and a shape selected to receive a substantial portion a respective side rail of a folding stair associated with an attic ceiling opening, wherein said top portion and said four sidewalls are formed from two or more separable pieces configured to be joined together at a respective two or more joining surfaces to form the insulating cover, wherein the insulating cover further comprises a joining material to join the two or more separable pieces, wherein the joining material is either a glue or a tape.