Rod plug caps
Patent 5016674 Issued on May 21, 1991. Estimated Expiration Date: 
January 22, 2010. 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.
January 22, 2010. 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 595189 685561 1607428 2394831 InventorApplicationNo. 468004 filed on 01/22/1990US Classes:138/91, Double end138/89, WITH CLOSURES AND PLUGS165/71, WITH PURGE, OR DRAINAGE, COCK OR PLUG165/76WITH REPAIR OR ASSEMBLY MEANSExaminersPrimary: Bryant, III, James E.Attorney, Agent or FirmForeign Patent References
International ClassF16L 055/16AbstractThe present invention relates to rod plug caps for leaky tubes of a heat exchanger. The rod plug caps include a frustrum shaped tapered hollow plug having a top, a length, and a diameter. The diameter of the top being the widest of the plug. A plug nut is formed on the top of the plug. The plug nut and the plug are formed from one homogeneous piece of material. | |
