Patents Assigned to Perstorp AB
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Patent number: 6251180Abstract: Shrinkage-reducing agent intended as additive in aqueous cement comprising compositions. The agent comprises at least one acetal, preferably a cyclic formal, of a tri- or polyhydric alcohol, which acetal comprises at least one 1,3-dioxa group. The acetal has preferably a water solubility of at least 1%. The agent can, in addition to said acetal, comprise at least one amorphous silica, preferably a powderous silica. The invention refers in a further aspect to the use of said agent in said compositions. The agent is, when used, added to said composition in an amount of 0.1-20% by weight.Type: GrantFiled: October 15, 1999Date of Patent: June 26, 2001Assignee: Perstorp ABInventors: Jens Engstrand, Carl-Axel Sjögreen
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Patent number: 6225404Abstract: A thermoplastic compound comprising at least one linear or branched thermoplastic polymer or copolymer, having at least one reactive or graftable site (F1), which polymer is compounded with at least one hyperbranched dendritic polyester macromolecule being composed of a monomeric or polymeric nucleus and one or more monomeric or polymeric branching or spacing chain extenders. The macromolecule is optionally chain terminated and/or functionalized, whereby terminal chain extender functions, chain termination and/or functionalization provides the macromolecule with at least one reactive or graftable site (F2) being reactive to or graftable onto said reactive or graftable site (F1). In a further aspect, the invention relates to a thermoplastic composition comprising two or more components, whereby at least one is said thermoplastic compound. In yet a further aspect, the invention relates to a thermoplastic article made of one or more thermoplastic compounds, whereby at least one is said thermoplastic compound.Type: GrantFiled: March 4, 1999Date of Patent: May 1, 2001Assignee: Perstorp ABInventors: Kent Sorensen, Bo Pettersson, Louis Boogh, Jan-Anders Edvin Mansson
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Patent number: 6211329Abstract: A process for synthesis of a polymeric polyalcohol substantially and preferably built up form polyester units and composed of a monomeric or polymeric initiator molecule to which at least one dentritic branch (dendron) consisting of a number of branching generations is added. The branching generations comprise a polymericor monomeric branching chain extender having three reactive functions of which two are hydroxyl groups. The two hydroxyl groups of the ranching chain extender is acetal protected by reaction between said two hydroxyl groups and an acetal-forming carbonyl compound, preferably an aldehyde. The acetal protected branching chain extender is then employed for addition to the initiator molecule of a first branching generation followed by an optional deprotection of the hydroxyl groups by decomposition of acetals and for addition in repeated steps of further branching generations.Type: GrantFiled: February 29, 2000Date of Patent: April 3, 2001Assignee: Perstorp ABInventors: Nicola Rehnberg, Bo Pettersson, Ulf Annby, Mats Malmberg
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Patent number: 6188840Abstract: A process for the manufacturing of a pressure vessel made from a thermoplastic material or a thermosetting resin. The vessel comprises a first and a second vessel end part, and possibly an intermediate tube part. The vessel end parts include a circumfering shell (4) and each one dome (3). A number of partition and load distributing walls (5) stretch from the domes (3) towards the open part of each vessel end part. The possible intermediate tube part includes similar walls (5). The edges of the walls (5) will meet when the different parts are joined. A number of cells (6) are formed between the walls (5). A number of crossing areas are formed between intersecting walls (5). At least one crossing area is provided with a determination by achieving a hole (14) from the outside of the dome. The hole (14) is bigger than the crossing area and has a depth greater than thickness of the dome part (3).Type: GrantFiled: January 19, 1999Date of Patent: February 13, 2001Assignee: Perstorp ABInventors: Witold Orlowski, Olof Norrlöw
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Patent number: 6166162Abstract: An ecologically sound refractory material includes a binder made of a cashew nutshell liquid and a resin selected from a liquid phenol resin, a phenol homologue and a formaldehyde homologue.Type: GrantFiled: December 22, 1998Date of Patent: December 26, 2000Assignees: Thyssen Krupp Stahl GmbH, Perstorp ABInventors: Norbert Heine, Thomas Ballewski, Manfred Grossman
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Patent number: 6153603Abstract: The present invention relates to a method of treating angiogenesis in tumor tissue, such as glioma and glioblastama tissue. The method comprises administering to a mammal, including, man an effective amount at an isomer of inositol trisphosphate, such as D-myo-inositol-1,2,6-trisphosphate, or a pharmaceutically acceptable salt thereof.Type: GrantFiled: May 22, 1998Date of Patent: November 28, 2000Assignee: Perstorp ABInventor: Matti Siren
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Patent number: 6134854Abstract: A flooring system for use with floating floors is described which includes a glider bar having base portions including extending rails in the form of dovetail protrusions. The bases and rails are longitudinally moveable relative to anchoring plates, which anchoring plates are affixed to a subflooring. Flush finished floor moldings are slid longitudinally along the rails and are glued or mechanically fixed, at one side only, to the adjacent floating laminate flooring. By this assembly, smooth transitions between adjacent floating floors, or where floating floors meet another hard floor covering, or carpet, can be achieved. The system can also be used with flush stair nosing elements.Type: GrantFiled: December 18, 1998Date of Patent: October 24, 2000Assignee: Perstorp ABInventor: Oliver Stanchfield
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Patent number: 6135287Abstract: Collapsible container (1) for fluent and particulate bulk goods, which container includes a carrying base part (20) which is provided with shock absorbing members (21), collapsible side walls (30) and preferably a lid. The side walls (30) are movably attached to the base part (20) via hinge parts (31). Adjacent side walls (30) are furthermore inter-connectable via a coupling which is angularly flexible around a vertical pivot axle. The lid (50) is mechanically connected with the side walls (30) so that forces can be absorbed in both the vertical and the horizontal plane.Type: GrantFiled: December 30, 1999Date of Patent: October 24, 2000Assignee: Perstorp ABInventor: Peter Hartwall
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Patent number: 6106654Abstract: Process for the manufacturing of a decorative thermosetting laminate with a wear-resistant and a scratch resistant surface layer, wherein a continuous paper web is impregnated with melamine-formaldehyde resin, that one side of the web is coated with hard particles with a size of 30-90 .mu.m. After drying, the other side is coated with a melamine-formaldehyde resin containing hard particles with an average particle size of 1-15 .mu.m. The paper is, after drying, placed as the uppermost sheet in a laminate with the side coated with the smallest particles directed upwards towards a continuous pressure surface.Type: GrantFiled: December 12, 1997Date of Patent: August 22, 2000Assignee: Perstorp ABInventors: Per-Erik Velin, Nils-Joel Nilsson, Kent Lindgren
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Patent number: 6093777Abstract: A partially or fully cured thermosetting product which includes a cured and molded product of a thermosetting composition. The composition includes 70% to 99% by weight of at least one thermosetting resin or compound and 1% to 30% by weight of at least one toughening agent. The toughening agent is at least one hyperbranched dendritic macromolecule formed of ester units, optionally in combination with ether units.Type: GrantFiled: November 3, 1997Date of Patent: July 25, 2000Assignee: Perstorp ABInventors: Kent Sorensen, Bo Pettersson, Louis Boogh, Jan-Anders Edvin Manson
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Patent number: 6046334Abstract: The present application is directed to a heterocyclic compound having the structural formula: ##STR1## where R is hydrogen, C.sub.1 -C.sub.2 alkyl, cyclohexyl, phenyl, benzyl, phenylethyl, 2-hydroxyethyl, 3-hydroxypropyl, carboxymethyl, 4-(carboxylamine)butyl or diphenylmethyl; M is hydrogen, sodium, potassium, magnesium or ammonium; and x is 1 or 2. The heterocyclic compound having the aforementioned structural formula finds application in many pharmaceutical applications.Type: GrantFiled: May 13, 1998Date of Patent: April 4, 2000Assignee: Perstorp ABInventors: Lars Persson, Nicola Rehnberg
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Patent number: 6029840Abstract: Collapsible container for transport and storage, comprising a bottom part (2) and side walls (1) movably connected to the bottom part (2) via hinges (3) which are formed by lower hinge-parts (3') and upper hinge-parts (3"). The hinge-parts (3', 3") are integrated with their respective part (1, 2). Two side walls (1), placed on opposite sides are provided with an inwards angled edge (4') at each of their two ends. The edges (4') connect, when in upright position, with the adjoining side walls (1). The inwards angled edges (4') are provided with a number of coupling devices (5) which are intended to interact with corresponding couplings (6) placed at the ends (4") of the adjoining side walls (1). The side walls (1) can hereby be locked together in an upright position. At least two opposite side walls (1), preferably all four, are provided with hollow channel-like reinforcing profiles (7) stretching along three sides of each of the side walls (1), wherein one of the sides is always an upper side (8).Type: GrantFiled: December 23, 1998Date of Patent: February 29, 2000Assignee: Perstorp ABInventor: Manfred Brauner
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Patent number: 6024911Abstract: A method of producing an injection molded article, such as a pallet made of a polymeric material. The pallet having an integral rim. Said rim is manufactured by means of a gas injection procedure involving a mold and means for injecting a pressurized gas into a molten polymeric material in the mold. The injection of the pressurized gas results in at least one substantially closed circumambient hollow internal channel in the rim, wherein the mold is provided with one or more mold cavity portions with an enlarged or expandable cross-section providing the outer shape of at least parts of the rim. The mold is further provided with at least one gate for injection of a molten polymeric material, and at least one gas duct for injection of the pressurized gas into the core of the molten polymeric material. Each gas duct is connected to a reservoir cavity, which reservoir cavities collectively form a part of the mold cavity portions.Type: GrantFiled: February 5, 1998Date of Patent: February 15, 2000Assignee: Perstorp ABInventor: Manfred Brauner
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Patent number: 5990260Abstract: A branched alkenyl functional polyester of a prepolymer having at least one carboxyl and at least three hydroxyl groups, which is made allylfunctional by reaction between at least one of said hydroxyl groups in the prepolymer and at least one monomeric or polymeric compound having at least one allylic unsaturation. The prepolymer is a condensation product obtained by condensing at least one monomer selected from the group consisting of di, tri or polyhydroxyfunctional monocarboxylic acids having 2-18 carbon atoms optionally followed by further chain extension by addition of at least one monohydroxyfunctional monocarboxylic acid or corresponding lactone having 2-24 carbon atoms.Type: GrantFiled: September 8, 1998Date of Patent: November 23, 1999Assignee: Perstorp ABInventor: Bo Pettersson
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Patent number: 5944215Abstract: A plastic vessel for a pressurized fluid, having an upper end wall and a lower end wall and an intermediate part with an outer wall and internal partition walls. The internal partition walls are placed in such a way in respect of each other and the outer wall that at least two longitudinal compartments for pressurized fluid are formed, which compartments are communicating with each other and run between the end walls. The vessel is non-circular. The outer wall between each pair of partition walls has a curve, with a radius adapted in such a manner that the tensions arising in the outer wall when the vessel is filled with a pressurized fluid will mainly be transformed solely to tensile stress in the partition walls which are joined to the outer wall. The partition walls are joined to the outer wall in the border lines where two such curves meet.Type: GrantFiled: September 16, 1997Date of Patent: August 31, 1999Assignee: Perstorp ABInventor: Witold Orlowski
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Patent number: 5934638Abstract: A skid for a load carrying article, such as a pallet or a container pallet. The skid has at least two hollow profiles made of a polymeric material by injection molding using a gas injection procedure. Each hollow profile has two or more longitudinal substantially closed hollow chambers. The hollow chambers are separated from each other and enveloped by one or more defining walls. All portions of the walls are of an essentially even material thickness and where respective upper portions of the walls form an upper horizontal surface at which each hollow profile is attached to the article.Type: GrantFiled: November 20, 1996Date of Patent: August 10, 1999Assignee: Perstorp ABInventor: Jean Michel Provot
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Patent number: 5866557Abstract: The present invention relates to the use of an ester of inositoltrisphosphate for the preparation of a medicament for preventing, alleviating or combatting inflammatory conditions in mammals including man.Injury or destruction of tissues should be understood as damage to an aggregation of specialized cells with a particular function both internally and externally in the body, such as different organs or parts of these, vessels, skin etc.Tissue damage involves a complex series of events such as dilatation of vessel walls e.g. arterioles, capillaries and venules, increased permeability of fluids including e.g. plasma proteins and increased blood flow. Increased vascular leakage often results in extravasation and oedema formation which characterize the damage of different tissues.Often tissue damage and inflammatory conditions are characterized by signs of pain, heat, redness, swelling and loss of function.Type: GrantFiled: July 22, 1996Date of Patent: February 2, 1999Assignee: Perstorp ABInventors: Lars Persson, Nicola Rehnberg, Torgny Gustafsson
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Patent number: 5846957Abstract: The present invention relates to the use of an ester of inositoltrispbosphate for the preparing of a medicament effective against retroviral diseases.Type: GrantFiled: May 21, 1996Date of Patent: December 8, 1998Assignee: Perstorp ABInventor: Matti Siren
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Patent number: D417539Type: GrantFiled: February 13, 1997Date of Patent: December 7, 1999Assignee: Perstorp ABInventor: Kaj Koskinen
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Patent number: D421183Type: GrantFiled: April 20, 1998Date of Patent: February 29, 2000Assignee: Perstorp ABInventor: Kaj Koskinen