Chromatographic column with improved end fittings
Patent 4026803 Issued on May 31, 1977. Estimated Expiration Date: 
May 31, 1994. 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.
May 31, 1994. 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 3334514 3440864 3474908 3682315 3800956 3855130 Method and device for extracting filter frits from liquid chromatographic columns Patent #: 3978575 InventorsAssigneeApplicationNo. 05/644179 filed on 12/24/1975US Classes:210/198.2ChromatographyExaminersPrimary: Adee, JohnAttorney, Agent or FirmAbstractNovel end fitting assemblies of particular advantage for use on liquid chromatographic columns, and novel chromatographic columns comprising these novel end fittings. The end-fittings are characterized by (a) very low dead space; (b) economical and convenient replacement of wearing parts; with minimal disturbing of the packed column, or other functional end-fitting components such as cones, filters, etc. A particular advantage is the design whereby the connector portions of the fitting assembly are not normally wetted by process fluids during operation of the column. Thus, the connector portions of the assemblies can be selected from a wide variety of mechanically-desirable materials selected for their wearing characteristics. Moreover, the fittings can be tightened for high-pressure operation without damage to the structure of the column of which they are used. | |
