Floor panels are provided with a mechanical locking system having small local protrusions which reduce displacement along the joint when the panels are laying flat on the sub floor and locked vertically and horizontally. A method to install a floor comprising a plurality of rectangular floor panels laying in parallel rows on a sub floor with long and short edges which are connectable to each other along one pair of adjacent long edges and one pair of adjacent short edges.

T-type shear connector, having: a first quadrilateral plate; and a second quadrilateral plate fixed perpendicularly and transversely, by way of one of its sides, on the middle part of the first quadrilateral plate. Formed floor system of metallic elements and concrete slab, including at least one T-type shear connector as described above, for connecting the metallic elements to the concrete slab; wherein the T-type shear connector is fixed from a cocked position. Method for constructing the floor system, including: fixing at least one T-type shear connector on the metal elements by way of a strong fastening element; and adding a concrete mixture on the metal elements and the T-type shear connector.

Improved stripper solutions for removing photoresists from substrates are provided that typically have freezing points below about 0? C. and high loading capacities. The stripper solutions comprise dimethyl sulfoxide, quaternary ammonium hydroxide, and an alkanolamine having at least two carbon atoms, at least one amino substituent and at least one hydroxyl substituent, the amino and hydroxyl substituents attached to two different carbon atoms. Some formulations can additionally contain a secondary solvent. The formulations do not contain tetramethylammonium hydroxide. Methods for use of the stripping solutions are additionally provided.

This invention relates to an assembly type floor panel that is easy to assemble, dismantle, and maintain, and that closely and nonadhesively contacts an underlying floor. The floor panel is composed of a base panel of elastic material, e.g., calcium carbonate, a stiffer panel on the upper side of the base panel and a sliding protective sheet on the bottom side of the base panel. Adjacent panels are joined by the cooperation of a projection and groove along an edge of one panel with a projection and groove along an edge of an adjacent panel. By virtue of the elasticity of the base panel and the protective sheet, the floor panel can closely contact an underlying floor, accommodate uneveness in the underlying floor, and conduct heat from the underlying floor.

A cladding or siding assembly includes at least one panel member and at least two parallel and spaced support rail members to allow at least one panel member to slidably interfit in between the support rail members, to be located and be removable during or after construction. The panel member is slotted between an upper support rail member and a parallel lower support rail member. At an upper end of the panel member recess slidably interfits with the lower tab member of the upper support rail member having second end leg of perimeter frame within lower recess and the recess at a lower end of the same panel member slidably captures shorter upper tab member of the lower support rail member whereby second end leg is captured in upper recess of lower support rail member.

This invention relates to an assembly type floor panel that is easy to assemble, dismantle, and maintain, and that closely and nonadhesively contacts an underlying floor. The floor panel is composed of a base panel of elastic material, e.g., calcium carbonate, a stiffer panel on the upper side of the base panel and a sliding protective sheet on the bottom side of the base panel. Adjacent panels are joined by the cooperation of a projection and groove along an edge of one panel with a projection and groove along an edge of an adjacent panel. By virtue of the elasticity of the base panel and the protective sheet, the floor panel can closely contact an underlying floor, accommodate uneveness in the underlying floor, and conduct heat from the underlying floor.

A panel for a surface covering system of a plurality of like panels, the panel comprising: a base layer; a first joint extrusion attached along a first edge of the base layer; a second joint extrusion attached along a second edge of the base layer, opposite the first edge; a covering layer covering at least part of the first joint extrusion and at least part of the second joint extrusion; wherein the first extrusion is configured to join to a second extrusion of an adjacent like panel, and the covering layer substantially conceals the first extrusion and the second extrusion when installed.

A panel for a surface covering system of a plurality of like panels, the panel comprising: a base layer; a first joint extrusion attached along a first edge of the base layer; a second joint extrusion attached along a second edge of the base layer, opposite the first edge; a covering layer covering at least part of the first joint extrusion and at least part of the second joint extrusion; wherein the first extrusion is configured to join to a second extrusion of an adjacent like panel, and the covering layer substantially conceals the first extrusion and the second extrusion when installed.