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Felix Hoffmann, a German chemist, was searching for something to relieve his father's arthritis. In doing so, he "rediscovered" acetylsalicylic acid and in 1900, patented a stable process for developing it. Hence, we have aspirin.
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US Patent 4960546 - Diffuser mounting arrangement for waste water aeration systems
US Patent Issued on October 2, 1990
Estimated Patent Expiration Date:
April 19, 2009Estimated 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:
April 19, 2009Estimated 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.AbstractAn improved mounting bracket for mounting diffusers on submerged air lateral pipes in a waste water treatment system. Each mounting bracket includes a pair of complemental saddle sections which can be clamped securely yet releasably on the air lateral with an outlet spout of the saddle in registration with a discharge port in the bottom of the air lateral. A Tee fitting has a pipe nipple connected with its inlet, and the pipe nipple can be threaded into the outlet spout. Virtually any type of diffuser can be solvent welded to each outlet of the Tee fitting. The mounting bracket surrounds and reinforces the air lateral at the diffuser connection point and takes advantage of relatively large diameter pipe at the threaded connection between the outlet spout and pipe nipple. All parts can be PVC or a similar plastic and can withstand the stresses which are applied because of the structural strength of the diffuser mounting arrangement. | InventorAssigneeApplicationNo. 340265 filed on 04/19/1989US Classes:261/122.1, Submerged screen261/124, Multiple jet285/197, Saddle-type clamp285/915MASTICField of Search261/124, Multiple jet285/915, MASTIC285/197Saddle-type clampExaminersPrimary: Miles, Tim R.Attorney, Agent or FirmUS Patent References3489441, 3501133, 3918748, 3953553, Sewage treatment aeration systemsIssued on: 04/27/1976 Inventor: Thayer3976314, Tube coupler Issued on: 08/24/1976 Inventor: Graham4158461, Pipe tapping bands Issued on: 06/19/1979 Inventor: Francis4273364, Branch piece Issued on: 06/16/1981 Inventor: de Lange4391458, Pipe coupling with gasket locating means Issued on: 07/05/1983 Inventor: Blakeley4521037, Pipe coupling Issued on: 06/04/1985 Inventor: Knox4563277, Apparatus for aerating and mixing waste water Issued on: 01/07/1986 Inventor: Tharp4818446Apparatus for introducing a gas into a fluid Issued on: 04/04/1989 Inventor: Schreiber , et al. Foreign Patent References
International ClassB01F 003/04 |
