Process control system using remote computer and local site control computers for mixing a proppant with a fluid
July 25, 2009. Estimated 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.Patent ReferencesIndustrial process control system Mixture concentrator Modular instrumentation for monitoring and control of biochemical processes Distributed measurement and control system for industrial processes Remote computer control for irrigation systems Well valve control system System for processing information Transportable material conveying apparatus Transportable integrated blending system Local area network data transfer system InventorsAssigneeApplicationNo. 384740 filed on 07/25/1989US Classes:700/265, Nonreactive mixing process (e.g., mixing cement, preparing solution, diluting chemical)700/42Proportional-Integral-Derivative (P-I-D)ExaminersPrimary: Jablon, Clark A.Attorney, Agent or FirmForeign Patent References
International ClassesG06F 015/46G06G 007/58 G05D 011/02 G05D 011/08 AbstractA process control system includes a remote control computer located remotely from where the process is to be performed, and the system includes a monitor computer and a local control computer both located where the process is to be performed. The monitor computer and the local control computer are connected to the remote control computer by a common cable including at most two communication channels, each defined in a preferred embodiment by a respective pair of electrical conductors.Other References
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