# US 2017/0282113 A1 · Gas Chromatography Columns with Integrated Ferrules > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2017/0282113 A1 - Document ID: US20170282113A1 - Status: Published application - Kind: A1 - Application number: 15/083,678 - Filed: 2016-03-29 - Published: 2017-10-05 - Earliest claimed: 2016-03-29 - Assignees: Thermo Finnigan LLC - Applicants: Thermo Finnigan LLC - Inventors: Edward B. McCauley - Web page: https://patentgrep.com/patent/US20170282113A1 ## CPC - G01N 30/6026: {Fluid seals} - B01D 53/025: {with wetted adsorbents; Chromatography (analytical chromatography G01N30/00 - G01N30/96; for liquids B01D15/08)} - B01J 20/28097: {being coated, filled or plugged with specific compounds} - B01J 20/3204: {Inorganic carriers, supports or substrates} - B01J 20/3272: {Polymers obtained by reactions otherwise than involving only carbon to carbon unsaturated bonds} - C09D 179/08: Polyimides; Polyester-imides; Polyamide-imides; Polyamide acids or similar polyimide precursors - G01N 30/6052: {body} - G01N 30/6078: {Capillaries} - G01N 30/88: Integrated analysis systems specially adapted therefor, not covered by a single one of the groups G01N30/04 - G01N30/86 - B01D 2253/202: Polymeric adsorbents - B01J 2220/84: Capillaries - B01J 2220/86: Sorbents applied to inner surfaces of columns or capillaries - G01N 2030/8881: {Modular construction, specially adapted therefor} - G01N 2030/889: {monitoring the quality of the stationary phase; column performance} - G01N: INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES (measuring or testing apparatus or processes other than immunoassay, involving enzymes or microorganisms C12M, C12Q) - B01D: SEPARATION (separating solids from solids by wet methods B03B, B03D; by pneumatic jigs or tables B03B; by other dry methods B07; magnetic or electrostatic separation of solid materials from solid materials or fluids, separation by high-voltage electric fields B03C; centrifuges, vortex apparatus B04; presses per se for squeezing-out liquid from liquid-containing material B30B9/02; treatment of water C02F, e.g. softening by ion-exchange C02F1/42; {arrangements of air intake cleaners in gas turbine plants F02C7/05} ; arrangements or mounting of filters in air-conditioning, air-humidification or ventilation F24F13/28) - B01J: CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS - C09D: COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR (cosmetics A61K; processes for applying liquids or other fluent materials to surfaces, in general, B05D; staining wood B27K5/02; glazes or vitreous enamels C03C; natural resins, French polish, drying-oils, driers, turpentine, per se, C09F; polishing compositions other than French polish, ski waxes C09G; adhesives or use of materials as adhesives C09J; materials for sealing or packing joints or covers C09K3/10; materials for stopping leaks C09K3/12; processes for the electrolytic or electrophoretic production of coatings C25D) ## Abstract A capillary column includes a fused silica tubing and a polyimide coating over the fusing silica tubing. Additionally, the capillary column further includes a first plurality of integrated ferrules positioned along at least a first portion of the fused silica tubing and spaced apart from one another by a first fixed interval. ## Claims ### Claim 1 A capillary column comprising: a fused silica tubing; a polyimide coating over the fusing silica tubing; and a first plurality of integrated ferrules positioned along at least a first portion of the fused silica tubing and spaced apart from one another by a first fixed interval. ### Claim 2 (depends on 1) The capillary column of claim 1 wherein the first fixed interval is not less than an insertion depth. ### Claim 3 (depends on 1) The capillary column of claim 1 wherein the first plurality of integrated ferrules are oriented in a first direction and first portion of the fused silica tubing is located at or near a first end of the capillary column, and further comprising a second plurality of integrated ferrules positioned along a second portion of the fused silica tubing and spaced apart from one another by a second fixed interval, the second portion of the fused silica tubing located at or near a second end of the capillary column. ### Claim 4 (depends on 3) The capillary column of claim 3 wherein the first fixed interval is greater than the second fixed interval. ### Claim 5 (depends on 1) The capillary column of claim 1 wherein the plurality of integrated ferrules include graphite, polyimide, or a combination thereof. ### Claim 6 (depends on 5) The capillary column of claim 5 wherein the plurality of integrated ferrules are cemented to the polyimide coating. ### Claim 7 (depends on 1) The capillary column of claim 1 wherein the plurality of integrated ferrules include a metal. ### Claim 8 (depends on 7) The capillary column of claim 7 wherein the plurality of integrated ferrules are pre-swaged to the capillary column. ### Claim 9 A method of manufacturing a capillary column, comprising: obtaining a polyimide coated fused silica tubing; and affixing a plurality of ferrules to the polyimide coated fused at a fixed interval from one another. ### Claim 10 (depends on 9) The method of claim 9 wherein obtaining the polyimide coated fused silica tubing includes: forming a fused silica tubing; and coating the fused silica tubing with one or more layers of polyimide. ### Claim 11 (depends on 9) The method of claim 9 wherein the fixed interval is not less than an insertion depth. ### Claim 12 (depends on 9) The method of claim 9 wherein affixing the plurality of ferrules includes pre-swaging the ferrules or cementing the ferrules in place. ### Claim 13 (depends on 9) The method of claim 9 wherein affixing the plurality of ferrules includes forming the ferrules in place. ### Claim 14 (depends on 9) The method of claim 9 wherein the plurality of integrated ferrules include graphite, polyimide, or a combination thereof. ### Claim 15 (depends on 9) The method of claim 9 wherein the plurality of integrated ferrules include a metal. ### Claim 16 A method of using a capillary column, the capillary column including a plurality of integrated ferrules positioned along at least a portion of the capillary column and spaced apart by a fixed length, the plurality of integrated ferrules including a first ferrule and a second ferrule, the method comprising: unscrewing a nut securing the capillary column at the first ferrule; removing an end of the capillary column from an instrument; trimming the capillary column to remove an end portion including the first ferrule and leaving the second ferrule spaced from the end of the capillary column by a predetermined length of capillary column; inserting the predetermine length of capillary column into an opening of the instrument; and securing the capillary column in place with the nut. ### Claim 17 (depends on 16) The method of claim 16 wherein the plurality of integrated ferrules include graphite, polyimide, or a combination thereof. ### Claim 18 (depends on 17) The method of claim 17 wherein the plurality of integrated ferrules are cemented to the polyimide coating. ### Claim 19 (depends on 16) The method of claim 16 wherein the plurality of integrated ferrules include a metal. ### Claim 20 (depends on 19) The method of claim 19 wherein the plurality of integrated ferrules are pre-swaged to the capillary column.