Swimming pool water level control apparatus
Patent 4445238 Issued on May 1, 1984. Estimated Expiration Date: 
September 29, 2002. 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.
September 29, 2002. 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 References 352647 2305102 3339578 3446222 3596673 3759286 3916926 Fluid-dispensing apparatus having level control and alarm means Fiber optic liquid level sensor Vapor delivery system and method of maintaining a constant level of liquid therein InventorApplicationNo. 06/426988 filed on 09/29/1982US Classes:4/508, And water level control137/392, Electrical characteristic sensing137/393, With control fluid connection at desired liquid level210/127, Additional fluid inlet control4/509, And pump73/290RLIQUID LEVEL OR DEPTH GAUGEExaminersPrimary: Artis, Henry K.Attorney, Agent or FirmInternational ClassesE04H 4/00 (20060101)E04H 4/12 (20060101) AbstractSwimming pool water level control apparatus includes a remote indicator for sensing the water level in a swimming pool and for turning on and off a water flow control valve to provide water for the swimming pool. | |
