Vacuum tank
Patent 4153103 Issued on May 8, 1979. Estimated Expiration Date: 
October 25, 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.
October 25, 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 3151416 3454080 3559835 3712012 InventorApplicationNo. 05/844529 filed on 10/25/1977US Classes:165/47, STRUCTURAL INSTALLATION220/592.21, Including means for reflecting heat220/592.27, Vacuum insulation52/269Dissimilar material sheet-form facingExaminersPrimary: Geoghegan, Edgar W.Attorney, Agent or FirmInternational ClassesB65D 90/06 (20060101)B65D 90/02 (20060101) F28D 20/00 (20060101) Foreign Application Priority Data1977-08-16 CHAbstractA vacuum tank or the like, especially for the storage of heat for a long period of time, comprising an outer pressure shell and an inner shell having an evacuated intermediate space. The pressure shell is formed of concrete and equipped with a metal covering bearing thereagainst. Support elements or anchoring means arranged at the metal covering are anchored in the pressure shell. The inner shell is formed of a compression resistant material. | |
