Abstract: Aramid block copolymers which contains blocks whose polymer chains are flexible, and blocks whose polymer chains are flexible in solution and in undrawn polymer, but relatively rigid in drawn polymer, are disclosed. The aramids are tough materials with high modulus and tensile strength. Also disclosed is a process for making such block copolymers. The copolymers are useful as fibers and films, for example in ropes and composites.
Abstract: Novel hydroxy containing fluorovinyl ethers, polymers of hydroxy containing fluorovinyl ethers, novel cyclic ethers, copolymers of selected hydroxy containing fluorovinyl ethers, a process for reducing ester containing fluorovinyl compounds to the corresponding alcohol with borohydrides, and a process for polymerizing hydroxy containing fluorovinyl ethers are disclosed.
Abstract: Excellent resolution and sensitivity in the patterning of resists utilized in device and mask manufacture is obtained with a specific composition. In particular this composition involves polymers having recurring pendant acid labile .alpha.-alkoxyalkyl carboxylic acid ester moieties in the presence of an acid generator activated by actinic radiation such as UV-visible, deep ultraviolet, e-beam and x-ray radiation.
Type:
Grant
Filed:
April 10, 1990
Date of Patent:
April 27, 1993
Assignees:
E. I. du Pont de Nemours and Company, American Telephone and Telegraph Company
Inventors:
Walter R. Hertler, Dotsevi Y. Sogah, Gary N. Taylor
Abstract: This invention relates to a process for making polymers containing benzoxazole groups by heating, and thereby dehalogenating, novel anions of orthohalogenated aromatic amide groups of a polyamide. The products are useful as fibers and films.
Abstract: The present invention concerns novel dioxolane containing fluoroepoxides that are useful as curing materials, adhesives lubricants and coatings.
Abstract: This invention relates to a process for the living cationic polymerization of vinylic unsaturated compounds containing electron donating substituents resulting in polymers of narrow molecular weight distribution.
Type:
Grant
Filed:
November 25, 1988
Date of Patent:
March 23, 1993
Assignee:
E. I. Du Pont de Nemours and Company
Inventors:
Chang Cho, Ben-Ami Feit, Owen W. Webster
Abstract: Novel hydroxy containing fluorovinyl ethers, polymers of hydroxy containing fluorovinyl ethers, copolymers of selected hydroxy containing fluorovinyl ethers, a process for reducing ester containing fluorovinyl compounds to the corresponding alcohol with borohydrides, and a process for polymerizing hydroxy containing fluorovinyl ethers are disclosed.
Abstract: A novel process for making fluoropolymer-fiber composites is disclosed, which produces composites with improved physical properties. The composites are useful in parts that require chemical and/or thermal stability, as in chemical process equipment.
Abstract: This invention is a combination lens and teleidoscope/kaleidoscope device for use in creating special photographic effects by enabling the user to take close-up photographs of Kaleidoscopically and Teleidoscopically produced designs. The device is adapted by means of a series of fittings, for attachment to a camera. A turnable mirror tube located within one embodiment of the device, allows a user to control the composition of his photograph without physically moving the camera itself or the design producing element.
Abstract: A combination device for wireless video monitoring and remote control of a still camera is disclosed. In operation, the device includes a television camera that is positioned so as to photograph through the view finder of a camera. The image photographed is transmitted electronically to a video receiving means located at a remote distance from the camera. The camera lens and the means for vertical and horizontal positioning of the still camera are connected by servo motor means to a means for receiving control signals. The control signals control the focusing of the lens and horizontal or vertical position of the camera. A transmitting device located at the site of the video receiving means, transmits control signals for directing the servo motor means to move the camera's lens or change the camera's position.
Abstract: This invention is a pocket sized, block shaped device for storing the powder, projectiles and trouble shooting tools necessary for the rapid loading of the flintlock type, muzzle loading firearms, when used in the field. The device permits the user to premeasure a plurality of gunpowder charges into cavities bored into the body of the device, for later successive release by means of a novel sliding release mechanism. A dispenser for priming powder is frictionally housed within the body of the device for easy access and use. In addition, the user can insert a plurality of patched projectiles into sleeves bored into the device for successive release, later, when needed in the field. The device also houses an array of tools needed for maintenance of the gun and trouble shooting under field conditions.
Abstract: An axe head, for splitting wood is disclosed. The outside surface of the axe head has a convex shape, while the upper portion of the inside surface has a concave shape. In an alternative embodiment of the invention, the entire inside surface of the axe head, has a concave shape. The combination of the convex and concave outer and inside surfaces of the axe head enhance the axe's ability to split wood.
Abstract: An improved device for preventing ladders that are positioned against structures from slipping, is disclosed. The invention includes a pointed vertical member, adapted for insertion in the ground, in snow or in other non-solid surfaces, connected to two projecting arm members that are adapted to fit about ladder legs and over ladder feet, where present, providing an inexpensive and improved means for avoiding ladder slippage.