Abstract: The invention is a locking device for a garbage dumpster. The invention includes a vertical channel attached to the front wall of a dumpster. A spring loaded vertical post extends through the vertical channel. A locking mechanism is attached to the spring loaded vertical post and rotatably attached to the top of the vertical channel. When a dumpster is on the ground, the weight of the dumpster against the ground engages the lock on top of the dumpster lid. When the dumpster is lifted from ground, the lock is disengaged from the dumpster lid via a spring.

Abstract: Melt-processable polyaramide and polyarylate polymers and copolymers are made employing a component containing the 5-t-butylisophthaloyl moiety and aromatic diamines or aromatic diols. The melt processability of these polymers can eliminate expensive processing in making shaped articles. The claimed materials are useful for making fiber, film, laminates, coatings, adhesives and molded objects.

Abstract: Novel copolyoxadiazole-imides are disclosed. These copolyoxadiazole-imides are useful for the manufacture of fibers, films, felts, coatings and molded objects.

Abstract: Co-polyoxadiazoles prepared from 5-t-butylisophthalic acid and common organic diacids are disclosed. They are useful as fibers, films, coatings, felts, laminates and molded objects.

Abstract: A novel polyoxadiazole from 5-t-butylisophthalic acid is disclosed. Also, fibers, films, coatings and molded objects made therefrom.

Abstract: Novel polyoxadiazoles soluble in m-cresol are disclosed. Also fibers, films, coatings and molded objects made therefrom. The copolyoxadiazoles are prepared from 5-t-butylisophthalic acid and N,N'-aliphatic or aromatic hydrocarbon radicals (4-carboxyphthalimide), when coreacted with either terephthalic acid or isophthalic acid or a mixture of terephthalic acid and isophthalic acid.

Abstract: Novel Poly[N,N'-(alkyl or aryl)-bis(4,4'-phthalimido)-1,3,4-oxadiazole-2,5-diyls], compositions for fibers, films, coatings and molded objects featuring high strength and high thermal properties with formulation advantages.

Abstract: A pilfer resistant device for holding articles such as jewelry chains, necklaces and the like. The device includes a circular display member upon which the chains are positioned, by slipping them through one or more separations or spaces formed in the display member, so that the chain can be suspended over the member. Small sleeves, having the same arc as the display member, are slidably mounted on the display member for closing the gaps formed in the display member. By rotating the sleeve a small amount with respect to the display member, the sleeve can be effectively locked onto the display member.

Abstract: Injection moldable copolymers are prepared from fully or partially acylated aromatic diamines and aromatic tricarboxylic anhydride compounds, aromatic dicarboxylic acids or mixtures of aromatic tricarboxylic acid anhydrides and aromatic dicarboxylic acids. These copolymers are useful for the preparation of injection molded articles and fibers.

Abstract: Novel copolymers and terpolymers of the amide-imide type are prepared from tricarboxylic acid anhydride compounds, N,N'-diacylated diamines, N-acylated diamines, and primary diamines. These copolymers and terpolymers are useful for preparing injection molded articles of superior properties. A novel process for the manufacture of amide-imide copolymers and terpolymers is disclosed wherein the imide, imide-imide, amide, and amide-amide moieties incorporated into the polymer backbone can be controlled by acylating the amine functionality which is to form the amide and amide-amide moieties while reacting directly those diamines with a tricarboxylic anhydride compound which are intended to form the imide and imide-imide moieties.

Abstract: A novel process for the preparation of injection moldable polymers prepared from diacylated aliphatic diamines, tricarboxylic anhydride compounds and aliphatic primary diamines. These polymers are useful for the preparation of injection molded articles and fibers. A process for enhancing the crystallization of these polymers by the addition of nucleating agents is also disclosed.

Abstract: A novel process for the preparation of injection moldable polymers prepared from diacylated aliphatic diamines, tricarboxylic anhydride compounds and aliphatic primary diamines. These polymers are useful for the preparation of injection molded articles and fibers. A process for enhancing the crystallization of these polymers by the addition of nucleating agents is also disclosed.

Abstract: Injection moldable copolymers are prepared from fully or partially acylated aromatic diamines and aromatic tricarboxylic anhydride compounds or mixtures of tricarboxylic anhydrides and dicarboxylic acids. These copolymers are useful for the preparation of injection molded articles and fibers.

Abstract: Novel tailor made copolymers and terpolymers of the amide-imide type are prepared from tricarboxylic acid anhydride compounds, N,N'-diacylated diamines, N-acylated diamines, and primary diamines. These copolymers and terpolymers are useful for preparing injection molded articles of superior properties. A novel process for the manufacture of amide-imide copolymers and terpolymers is disclosed wherein the imide, imide-imide, amide, and amide-imide moieties incorporated into the polymer backbone are controlled by acylating the amine functionality which is to form the amide and amide-amide moieties while reacting directly those diamines with a tricarboxylic anhydride compound which are intended to form the imide and imide-imide moieties.

Abstract: Esterification of phenolic compounds which comprises reacting a phenolic compound and a carboxylic acid using a catalyst consisting essentially of an alkali metal compound and a boron compound wherein said alkali metal compound is at least one member selected from the group consisting of alkali metal salts of boric acid, alkali metal polyborates, alkali metal hydroxides, and alkali metal borohydrides and said boron compound is at least one member selected from the group consisting of boric acid, boric anhydride, alkali metal polyborates, alkali metal salts of boric acid and alkali metal borohydrides.

Abstract: A process for preparing high molecular weight solid polymers, which process comprises reacting essentially equal molar amounts of a carbocylic aromatic primary diamine and an acyl halide derivative of trimellitic anhydride under essentially anhydrous conditions for a period of time and at a temperature controlled to produce a polymer with free carboxyl groups and amide groups available for further reaction. Also, a process for preparing cured polyamine-imide polymers which comprises heating of the soluble polymers prepared as aforementioned at a temperature above 150.degree. C. sufficient to effectively and substantially convert said carboxyl and amide groups to imide groups and thereby produce a polyamine-imide which is insoluble in organic polar solvents.

Abstract: Process of producing an amideimide polymer without using an acid having an acyl halide group which comprises reacting a composition comprising an aromatic diprimary amine and a tricarboxylic acid compound in an alcoholic solvent comprising an alkanol containing from 4 to 10 carbon atoms. In those cases where only diprimary aromatic amine is reacted, a tertiary amine is required. If desired, a glycol can be present.

Abstract: Polyamides are prepared by reacting aromatic diacid with aromatic or aliphatic diamine in the molar ratio of about 1:0.5 to about 1:0.9 and then reacting this product with at least 0.1 to about 0.5 up to about 0.75 moles of an aromatic or an aliphatic diisocyanate. The products are useful as wire enamels, coatings, and molding resins as well as films, fibers, adhesives, and impregnating materials.

Abstract: An apparatus for dispensing liquids into a container or tank with the container or tank having a filling hatch. The apparatus includes a filling tube which has a flange secured thereto which carries a seal member adapted to engage portions of the hatch for forming a seal between the flange and the hatch. Dispensing apertures are provided adjacent a lower end of the filling tube and a valve member is slidably mounted on the filling tube and is moveable between an aperture open and an aperture closed position with seal means being provided that cooperate with the filling tube and the valve member to prevent leakage of fluid from the filling tube when the valve member is in the aperture closed position.