Company Background and Patent Information:
Environmental Digital Services Inc. has been existence since 1987 to serve the environmental services and products market. The Company originally developed a computerized inventory control system and in 1991 turned it's attention to the development of a product to measure the volume of fluids in storage tanks. In 1992 a patent was awarded (#5,085,077) for electronically measuring the volume of petroleum and other potentially polluting fluids in below ground and above ground storage tanks. The process adjusts for each tank and it's environmental variables, and is highly accurate, meeting EPA standards for inventory control systems intended to detect tank leakage. Environmental Digital Services has been market testing it's device the "CAPSCAN" for the past three and one half years, principally with Texaco, and is now ready to come to market. As of July, 1998 the Company began trading on the OTC BB through a 15c211 filing.
More information on EVDS patents
5085077 : Ultrasonic liquid measuring device for use in storage tanks
containing liquids having a non-uniform vapor density
INVENTORS: Stapleton; Charles E., Bellevue, WA
Numata; Jerauld T., Renton, WA
ASSIGNEES: Capscan Sales Incorporate, Kirkland, WA
ISSUED: Feb. 4 , 1992
FILED: Jan. 7 , 1991, SERIAL NUMBER: 638393, MAINT. STATUS: INTL.
LASS (Ed. 5): G01F 023/28; U.S. CLASS: 073/290.V; 340/621; 367/908;
FIELD OF SEARCH: 073-290 V ; 340-621 ;
ABSTRACT: An ultrasonic liquid level detector mounted in a fill pipe cap. The ultrasonic detector mounted in a fill pipe cap (10) is used in determining a level and/or the volume of a liquid (5) stored in an underground storage tank (20). The fill pipe cap contains an ultrasonic ranging unit (50) that measures a time, TL, required for an
ultrasonic pulse to travel round trip between an ultrasonic transducer/receiver (54) and the surface of the liquid in the tank. A reference reflector (25) disposed within a fill pipe (30) is used in determining a reference time, TR, that is included in a non-linear
expression, e.alpha. .multidot.TL.beta..sbsp.1 .multidot.TR.beta..sbsp.2, in order to compute the level of liquid in the storage tank. The terms e.alpha., .beta.1, and .beta.2 comprise a correction for errors in the round-trip times TL and TR caused by a
non-uniform vapor density of the liquid along the path traveled by the ultrasonic pulses.
patents.ibm.com
This is indeed the EVDS patent. EVDS has been working with the Yarrow Bay Texaco in Kirkland Washington for several years to test this product. Upon completion of the developmental cycle the accuracy of the device has consistently been better than the EPA requirement for reporting inventory in underground tanks.
EVDS will be receiving two new patents in the short term future which
will effectively prevent any competitor from using the fill pipe as a method to monitor and keep inventory on storage tanks. These patents will cover both the USTs used in your average service station and those used in the home heating oil market. These are all EVDS's patents. No royalties or payments have to be made.
InvestRight
Regards, Jeff
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