Did You Know...
...Chester Carlson was a patent agent who tired of having to make multiple copies of patent applications using the only duplication method available at the time: carbon paper. In 1959 he came up with a new copying system and took it to IBM for evaluation. The "experts" at IBM determined potential sales to be only 5,000 units because people wouldn't want to use a bulky machine when they had carbon paper. Carlson's invention was the xerography process, the company founded on the system is Xerox.
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US Patent 6948508 - Apparatus and method for self-calibration of mass flow controller
US Patent Issued on September 27, 2005
Estimated Patent Expiration Date:
June 24, 2022Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
Estimated Patent Expiration Date:
June 24, 2022Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.AbstractA mass flow controller includes a mass flow sensor and a calibrator configured to perform a self-calibration on the mass flow controller. The calibrator generates flow measurements that are used as “standards” and flow measurements from the mass flow sensor are correlated to flow measurements from the calibrator. | InventorsAssigneeApplicationNo. 10178378 filed on 06/24/2002US Classes:137/1, PROCESSES137/486, Responsive to change in rate of fluid flow137/487.5, Electrically actuated valve73/1.35, With pressure measurement or plural flowmeters702/45, Flow metering702/100, Fluid or fluid flow measurement712/36, Application specific137/2, With control of flow by a condition or characteristic of a fluid137/10By speed of fluidField of Search137/1, PROCESSES137/486, Responsive to change in rate of fluid flow137/487.5, Electrically actuated valve73/1.16, Volume of flow, speed of flow, volume rate of flow, or mass rate of flow73/1.35, With pressure measurement or plural flowmeters73/202.5, Thermal sensing of flow702/45, Flow metering702/100Fluid or fluid flow measurementExaminersPrimary: Scherbel, David A.Assistant: Krishnamurthy, Ramesh Attorney, Agent or FirmUS Patent References5062446, Intelligent mass flow controllerIssued on: 11/05/1991 Inventor: Anderson5129418, Mass flow controller with supplemental condition sensors Issued on: 07/14/1992 Inventor: Shimomura, et al.5263369, Flow sensor system and method Issued on: 11/23/1993 Inventor: Cutler5594666, Mass flow control system Issued on: 01/14/1997 Inventor: Suzuki, et al.5660207, Flow controller, parts of flow controller, and related method Issued on: 08/26/1997 Inventor: Mudd5685005, Digital signal processor configured for multiprocessing Issued on: 11/04/1997 Inventor: Garde, et al.5765283, Method of making a flow controller Issued on: 06/16/1998 Inventor: Mudd5805442, Distributed interface architecture for programmable industrial control systems Issued on: 09/08/1998 Inventor: Crater, et al.5850850, Flow controller, parts of flow controller, and related method Issued on: 12/22/1998 Inventor: Mudd5865205, Dynamic gas flow controller Issued on: 02/02/1999 Inventor: Wilmer5911238, Thermal mass flowmeter and mass flow controller, flowmetering system and method Issued on: 06/15/1999 Inventor: Bump, et al.5944048, Method and apparatus for detecting and controlling mass flow Issued on: 08/31/1999 Inventor: Bump, et al.6061603, System for remotely accessing an industrial control system over a commercial communications network Issued on: 05/09/2000 Inventor: Papadopoulos, et al.6119047, Transmitter with software for determining when to initiate diagnostics Issued on: 09/12/2000 Inventor: Eryurek, et al.6151625, Internet web interface including programmable logic controller for controlling output devices based on status of input devices Issued on: 11/21/2000 Inventor: Swales, et al.6192281, Network accessible interface for a process control network Issued on: 02/20/2001 Inventor: Brown, et al.6216726, Wide range gas flow system with real time flow measurement and correction Issued on: 04/17/2001 Inventor: Brown, et al.6321272, Apparatus for controlling internetwork communications Issued on: 11/20/2001 Inventor: Swales6332348, Gas flow calibration of mass flow controllers Issued on: 12/25/2001 Inventor: Yelverton, et al.6333272, Gas distribution apparatus for semiconductor processing Issued on: 12/25/2001 Inventor: McMillin, et al.6343617, System and method of operation of a digital mass flow controller Issued on: 02/05/2002 Inventor: Tinsley, et al.6363958, Flow control of process gas in semiconductor manufacturing Issued on: 04/02/2002 Inventor: Ollivier6370448, Communication technique for field devices in industrial processes Issued on: 04/09/2002 Inventor: Eryurek6389364, System and method for a digital mass flow controller Issued on: 05/14/2002 Inventor: Vyers6450190, Method of detecting abnormalities in flow rate in pressure-type flow controller Issued on: 09/17/2002 Inventor: Ohmi, et al.6539968, Fluid flow controller and method of operation Issued on: 04/01/2003 Inventor: White, et al.6619258, System for controllably disabling cylinders in an internal combustion engine Issued on: 09/16/2003 Inventor: McKay , et al.6640140PLC executive with integrated web server Issued on: 10/28/2003 Inventor: Lindner , et al. Foreign Patent References
International ClassesG05D007/06G01F025/00 |
