Abstract: Process for the production of a powdered spherical tungstic acid by acidification of an aqueous alkaline tungstate solution with mineral acid at elevated temperature, preferably in a continuous stirred tank or a cascade of at least 2 continuous stirred tanks, and tungstic acid obtainable in this way, which is characterized by a high bulk density and spherical morphology.

Abstract: A portable outdoor enclosure includes a support frame and a three dimensional camouflage cover having a bi-layer construction that provides a high degree of unidirectional visibility. The cover includes an outer layer and an inner layer, the outer layer comprising a plurality of partial cutouts, the cutouts formed with a curvilinear incision pattern which are partially separable from the inner layer, the outer layer is attached to the inner layer at a plurality of spaced locations, and wherein the exterior-facing surfaces of both the outer layer and the inner layer are printed in a camouflage pattern and coloration. The inner layer of the cover includes a mesh upper portion permitting a high degree of outward visibility therethrough over a 360 degree horizontal visual field, and an opaque lower portion.

Abstract: A portable outdoor enclosure includes a support frame and a three dimensional camouflage cover having a bi-layer construction that provides a high degree of unidirectional visibility. The cover includes an outer layer and an inner layer, the outer layer comprising a plurality of partial cutouts, the cutouts formed with a curvilinear incision pattern which are partially separable from the inner layer, the outer layer is attached to the inner layer at a plurality of spaced locations, and wherein the exterior-facing surfaces of both the outer layer and the inner layer are printed in a camouflage pattern and coloration. The inner layer of the cover includes a mesh upper portion permitting a high degree of outward visibility therethrough over a 360 degree horizontal visual field, and an opaque lower portion.

Abstract: A convertible dual use bag is usable as a carrying member for a folded portable enclosure. When the enclosure is opened and set up, the bag may be opened up flat, and used as a floor. The bag includes a large multi-layered fabric sheet. The outer face of the sheet is provided with binding straps and carrying straps, for use when the bag is used as a carrying member. The inner surface of the sheet is free from straps and fasteners, and may be used as the upward facing floor surface. In its first use mode, the bag is used to enclose a collapsed portable enclosure such as a tent or ice shanty, including struts or frame sections and a fabric shell. The binding straps may be used to house and surround the components of the enclosure, so that these components are securely stowed within the bag. The dual use bag also includes carrying straps which permit the bag to be carried by the user.