Suction apparatus
Patent 4158916 Issued on June 26, 1979. Estimated Expiration Date: 
July 20, 1997. 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.
July 20, 1997. 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 530556 1698331 3000805 3324855 3758950 Dental saliva ejector Patent #: 4083115 InventorApplicationNo. 05/817388 filed on 07/20/1977US Classes:433/91, Having suction orifice604/268, With barrier, shield, or suction relief means adjacent tissue contacting orificeD24/112Conduit or nozzle (e.g., syringe, cannula, catheter, etc.) (8)ExaminersPrimary: Mancene, Louis G.Assistant: Foycik, Michael J. Jr. AbstractIn combination with a suction apparatus to eject saliva from the mouth of a human being during dental procedures, an attachment to be attached to the open end of a suction tube. The attachment comprises a suction apparatus cover in the form of a cloth, a fine mesh screening or a porous plastic material which is to evenly distribute the application of the vacuum across the exterior surface of the cover. | |
