Abstract: The subject invention, like prior two-way envelopes, relates to a remailable envelope formed from a blank which is symmetrical about its center line. The blank consists of three panels that are connected along fold lines: the front panel of the envelope, the back panel of the envelope and a third panel which is the resealing return flap. The front panel has a top flap and a pair of opposed side flaps that are used to construct the envelope. In addition, the front panel contains a viewing window for the original addressee and a return window for the return addressee. The resealing return flap is connected to the back panel by a fold line extending along the top edges of the back panel and resealing return flap and, for the initial mailing, is also attached to the back panel with weak adhesive spots that permit easy detachment for the return mailing. The resealing return flap contains a strategically placed window that is covered by the top sealing flap of the envelope during the initial mailing.

Abstract: The novelty proposed herein describes the application of niobium-based compositions and coatings, niobium oxides and their alloys capable of associations with other oxides and alloys by means of the thermal spraying technique for the purpose of an anticorrosive protection in highly corrosive environments, mainly those which present high temperatures, show presence of gases such as H2S, SO2, CO2, as well as organic and inorganic acids, commonly found in industrial centers.

Abstract: The present invention refers to compositions and coatings, having the niobium, its oxides and possible associations with other oxides as a pigment, and its utilization carried out by the usual techniques of painting, acting as an anticorrosive to organic acids, particularly the naphthenic acids in sulfide medium, persistently present in the petrochemical industry.

Abstract: The present invention refers to compositions and coatings, having the niobium, its oxides and possible associations with other oxides as a pigment, and its utilization carried out by the usual techniques of painting, acting as an anticorrosive to organic acids, particularly the naphthenic acids in sulfide medium, persistently present in the petrochemical industry.

Abstract: A modular space frame of a cabin that can be used without distinction in a medium, heavy, and tractor truck, which may be assembled in the same assembly line of any of these three types of trucks and with the same kind of tools is described.

Abstract: A modular space frame of cab-over type cabin that can be used without distinction in a medium, heavy, and tractor truck, which may be assembled in the same assembly line of any of these three types of trucks and with the same kind of tools is described.