Search
Now showing items 1-10 of 180
Ceramic materials with low thermal conductivity and low coefficients of thermal expansion
(United States Patent and Trademark Office, 1992-04-07)
Compositions having the general formula (Ca.sub.x Mg.sub.1-x)Zr.sub.4 (PO.sub.4).sub.6 where x is between 0.5 and 0.99 are produced by solid state and sol-gel processes. In a preferred embodiment, when x is between 0.5 and ...
Syntheses of D-chiro-3-inosose and (+)-D-chiro inositol
(United States Patent and Trademark Office, 1997-02-11)
There are described novel biocatalytic and chemical processes for the synthesis of various oxygenated compounds. Particularly, there are described processes for the synthesis of a useful synthon 12 made by reacting a ...
Mixing process for generating in-situ reinforced thermoplastics
(United States Patent and Trademark Office, 1993-07-06)
A method for blending polymeric materials includes the steps of producing a melt stream of a first polymer from a first extruder (12) and a separate melt stream of a second polymer from a second extruder (14), joining the ...
Zero-voltage-transition (ZVT) 3-phase PWM voltage link converters
(United States Patent and Trademark Office, 1996-11-12)
An improved zero voltage transition (ZVT) pulse width modulation (PWM) link converter is provided which introduces a space vector modulation scheme and an auxiliary circuit which includes a commutation power supply or ...
Magnesium doped .beta.-aluminum titanate thin film coating
(United States Patent and Trademark Office, 1996-10-15)
Mg.sub.x Al.sub.2-2x Ti.sub.1+x O.sub.5 (x.ltoreq.0.2) protective coatings have been developed for both dense and porous substrates, such as SiC and Si.sub.3 N.sub.4, using a chemical solution processing method involving ...
Method for separating fine particles by selective hydrophobic coagulation
(United States Patent and Trademark Office, 1992-11-10)
A process of selectively agglomerating coal in an aqueous environment while leaving the mineral matter dispersed has been developed. This process is autogenous for hydrophobic particles in that neither an agglomerating ...
Novel phosphorus containing epoxy networks
(United States Patent and Trademark Office, 1990-11-27)
Epoxy resins can be cured or crosslinked with triphenyl phosphine oxide compounds having epoxy-reactive (active hydrogen) substituents either alone or in combination with amine-terminated polyarylene ethers (e.g., ...
Method of producing prepolymers from hydroxyalkyl lignin derivatives
(United States Patent and Trademark Office, 1992-04-07)
A method of producing prepolymeric materials from lignin is disclosed. The method uses lignin which has been hydroxyalkyl modified, such that the lignin is substantially non-phenolic and solvent soluble and/or liquid. The ...
Reduced operator emission exposure antennas for safer hand-held radios and cellular telephones
(United States Patent and Trademark Office, 1996-07-30)
An antenna for a personal communication device designed for reducing RF emissions to a user's head and body comprises a single half-wave dipole antenna element mounted on the top of a telescoping rod such that the antenna ...
Detection, isolation and purification of Clostridium difficile toxin A with toxin receptors
(United States Patent and Trademark Office, 1992-03-24)
A method is provided for detecting the presence of C. difficile toxin A. Stool or other appropriate specimen is contacted with a reagent containing the human X, Y or I-antigens, each of which is a specific receptor for ...