Patent application number | Description | Published |
20100117022 | LUBRICANTS FOR REFRIGERATION SYSTEMS - A polyol ester suitable for use as a lubricant or a lubricant base stock has a kinematic viscosity at 40° C. less than or equal to 22 cSt and a viscosity index of greater than or equal to 140. The ester comprises a reaction product of (a) at least one polyhydric alcohol having at least 2 primary hydroxyl groups, (b) at least one monocarboxylic acid having 2 to 15 carbon atoms and (c) at least one polycarboxylic acid having 2 to 15 carbon atoms, wherein the number of acid groups derived from the polycarboxylic acid(s) is at least 25% of the total number of acid groups derived from the monocarboxylic and polycarboxylic acids. | 05-13-2010 |
20100181523 | CARBON DIOXIDE-BASED WORKING FLUIDS FOR REFRIGERATION AND AIR CONDITIONING SYSTEMS - A working fluid comprising (a) a refrigerant comprising carbon dioxide and (b) a poly(neopentylpolyol)ester composition produced by reacting a neopentylpolyol having the formula: | 07-22-2010 |
20100190672 | PRODUCTION OF POLYOL ESTER LUBRICANTS FOR REFRIGERATION SYSTEMS - A poly(neopentylpolyol) ester composition is produced by reacting a neopentylpolyol having the formula: | 07-29-2010 |
20110079749 | LUBRICANTS FOR REFRIGERATION SYSTEMS - A polyol ester suitable for use as a lubricant or a lubricant base stock has a kinematic viscosity at 40° C. greater than or equal to 200 cSt and a viscosity index of greater than or equal to 100. The ester comprises the reaction product of (a) a polyhydric alcohol component comprising at least 50 mole % of penterythritol, and (b) a carboxylic acid component comprising:
| 04-07-2011 |
20110240910 | Refrigeration Oil and Compositions with Carbon Dioxide Refrigerant - Lubricant compositions comprising certain mixtures of esters of pentaerythritol, di-pentaerythritol, tri-pentaerythritol and higher pentaerythritol oligomers are ideally suited for use with CO | 10-06-2011 |
20140097379 | Production of Polyol Ester Lubricants for Refrigeration Systems - A poly(neopentylpolyol) ester composition is produced by reacting a neopentylpolyol having the formula: | 04-10-2014 |
Patent application number | Description | Published |
20100066636 | Multiple-Cavity Antenna - An antenna for a Radio-Frequency IDentification (RFID) system is disclosed that comprises a pair of resonant cavities. The antenna is realized by folding the ends of a ribbon of conductive material, such as metal foil, over the middle part of the ribbon. The antenna generates a higher voltage than prior-art antennas used in RFID systems, and it makes possible RFID systems with an improved range. In an alternative embodiment, the antenna comprises a reflector that enables the RFID system to better tolerate the presence of nearby metal objects. | 03-18-2010 |
20100207840 | Multiple-Cavity Antenna - An antenna for a Radio-Frequency IDentification (RFID) system is disclosed that comprises a resonant structure, an RFID load element, and a floating coupling element. One of the two terminals of the RFID load element is connected directly to the resonant structure, and the other terminal is connected to the floating coupling element. The floating coupling element is electrically isolated from the resonant structure; its presence provides an improved impedance match to the RFID load element. | 08-19-2010 |
20100207841 | Multiple-Resonator Antenna - A Radio-Frequency IDentification (RFID) receiver is disclosed that comprises a plurality of resonant structures arranged to form an antenna. The resonant structures are interconnected in series and are arranged, relative to one another, so as to achieve a received electrical signal with an increased voltage, when the antenna is exposed to an incident electromagnetic signal. This occurs for a majority of all possible incident electromagnetic signals and, therefore, an RFID receiver based on such an antenna provides, in a majority of cases, an improved performance. | 08-19-2010 |
20100231407 | RFID power control and monitoring system - A system for monitoring parameters associated with a device, such as current, voltage, power, temperature, energy consumed, moisture, fluid levels and flow, wind speed, identification parameters, and repair history. The system includes the use of hybrid RFID sensor tags including a combination of active, semi-passive, and passive RFID circuits. Hybrid tags are attached to electrical system components. Standalone electrical components and generators and those connected to the electrical grid may be monitored. Data collected and stored in the hybrid tags may be accessed via a wireless communication link between hybrid tags and either active scanners or a passive interrogators. The data collected and processed from the hybrid tags may be provided to a user via the Internet or another wired or wireless communication network. | 09-16-2010 |
20110068987 | Multiband RFID tag - An RFID tag communicating with a wireless reader interrogator on more than one frequency band. In one embodiment the tag contains independent sensor circuits for a ultra high frequency UHF band and a lower frequency band. The UHF antenna element used in the tag is a double-resonant antenna typically operating in the 860-960 MHz frequency range providing both near and far field sensitivity. Separate resonant antenna structures a the lower frequency band is connected in series with the UHF antenna substructure. The high frequency HF antenna element contains a coil for magnetic induction pickup of signals typically in the 7-14 MHz frequency band but can also be used for the entire spectral range 100 KHz to 100 MHz. The tag antenna is an integrated structure providing for operation in both the UHF and a lower frequency band. In a separate embodiment the tag is configured with the UHF double-dipole antenna structure only and operates in a single UHF band. | 03-24-2011 |
20120256733 | RFID POWER CONTROL AND MONITORING SYSTEM - A system for monitoring parameters associated with a device, such as current, voltage, power, temperature, energy consumed, moisture, fluid levels and flow, wind speed, identification parameters, and repair history. The system includes the use of hybrid RFID sensor tags including a combination of active, semi-passive, and passive RFID circuits. Hybrid tags are attached to electrical system components. Standalone electrical components and generators and those connected to the electrical grid may be monitored. Data collected and stored in the hybrid tags may be accessed via a wireless communication link between hybrid tags and either active scanners or a passive interrogators. The data collected and processed from the hybrid tags may be provided to a user via the Internet or another wired or wireless communication network. | 10-11-2012 |
20130043315 | RFID tag with open-cavity antenna structure - A tag for a radio frequency Identification RFID system that comprises an open cavity with an integral load element. The load element is comprised of an impedance matching network and a load circuit. The load circuit contains one or more of an RFID transponder, microcontroller, capacitive sensor circuit, resistive sensor circuit, complex impedance sensor circuit, and an RF energy scavenging circuit in specific implementations. In various embodiments the tag includes reflector elements which enable the antenna structure to better tolerate the presence of nearby metal objects and provide electromagnetic gain. | 02-21-2013 |
20130050047 | RFID antenna with asymmetrical structure and method of making same - An RFID antenna comprised of a first arm, load element, and second arm together providing a complex impedance match to one or more load circuits contained within the load element for operation at one or more frequency bands. The load element is comprised of one or more load circuits. Load circuits are further comprised of one or more RFID transponders, energy scavengers, microcontrollers, and associated sensor circuits. The first and second arms are different in length and shape resulting in an asymmetrical antenna structure along the major axis. The first arm, the load element, and the second arm all comprise radiative electromagnetic structures for ultra high frequency and higher bands of operation. Embodiments provide an antenna with Faraday coils located within the arms operating in one or more of low frequency and, high frequency bands. | 02-28-2013 |
20130221113 | RADIATION-HARDENED RFID TAGS - RFID tags that must operate in the presence of ionizing radiation need to be radiation hardened in order to achieve reliable operation. This disclosure teaches several RFID tags that achieve radiation hardening without requiring the use of special-purpose radiation-hardened electronic devices. RFID tags typically use an antenna made of metal for achieving reliable radio communications. Radiation hardening is achieved by shaping the antenna such that the metal of the antenna acts as a shield for the radio circuits. | 08-29-2013 |
20140008446 | COMPACT MULTI-BAND ANTENNA - A multi-band antenna is disclosed that can operate in two different frequency bands through two different modes of operation. It can operate as a radio antenna for coupling energy into or out of a radio signal in a radio frequency band; or it can operate as a magnetic antenna for coupling energy into or out of a magnetic signal in a lower frequency band. A radio signal is a signal consisting of an electromagnetic wave; a magnetic signal is a signal consisting of a magnetic field. The multi-band antenna achieves the two modes of operation in a compact volume of space comparable to the volume of space occupied by an equivalent single-band antenna. | 01-09-2014 |
20140306725 | System for Wireless Corrosion Monitoring - A system is disclosed for wireless monitoring of corrosion as it occurs in a corrodible object. The system comprises one or more wireless corrosion sensors. A wireless corrosion sensor comprises an antenna assembly for transmitting and receiving radio signals. In the antenna assembly, at least part of the antenna assembly is made out of a corrodible material, such that, as the corrodible material undergoes corrosion, radio signals that are transmitted or received are affected. A remote system can estimate the extent of corrosion that has occurred by monitoring radio signals that are transmitted through the antenna assembly as it undergoes corrosion. | 10-16-2014 |