# US 11,441,121 B2 · Spheroid cell culture article and methods thereof > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,441,121 B2 - Document ID: US11441121B2 - Status: Granted - Kind: B2 - Application number: 15/708,473 - Filed: 2017-09-19 - Published: 2018-01-04 - Granted: 2022-09-13 - Earliest claimed: 2013-04-30 - Assignees: Corning Incorporated - Applicants: Corning Incorporated - Inventors: Scott Matthew Bennett; Brian Robb Douglass; Paul Ernest Gagnon, Jr.; Gregory Roger Martin; Paul Michael Szlosek; Allison Jean Tanner - Web page: https://patentgrep.com/patent/US11441121B2 ## CPC - C12N 5/0602: {Vertebrate cells} - C12M 23/02: {Form or structure of the vessel (large containers B65D88/00)} - C12M 23/12: {Well or multiwell plates (C12M25/04 takes precedence)} - C12M 23/24: {Gas permeable parts} - C12M 25/04: {in combination with well or multiwell plates, i.e. culture inserts} - C12M 29/04: {Filters; Permeable or porous membranes or plates, e.g. dialysis} - C12N: MICROORGANISMS OR ENZYMES; COMPOSITIONS THEREOF; PROPAGATING, PRESERVING, OR MAINTAINING MICROORGANISMS; MUTATION OR GENETIC ENGINEERING; CULTURE MEDIA (microbiological testing media C12Q1/00) - C12M: APPARATUS FOR ENZYMOLOGY OR MICROBIOLOGY; {APPARATUS FOR CULTURING MICROORGANISMS FOR PRODUCING BIOMASS, FOR GROWING CELLS OR FOR OBTAINING FERMENTATION OR METABOLIC PRODUCTS, i.e. BIOREACTORS OR FERMENTERS} ## Abstract A spheroid cell culture article including: a frame having a chamber including: an opaque side wall surface; a top aperture; a gas-permeable, transparent bottom; and optionally a chamber annex surface and second bottom, and at least a portion of the transparent bottom includes at least one concave arcuate surface, is disclosed. Methods of making and using the article are also disclosed. ## Claims ### Claim 1 A cell culture article comprising: a chamber comprising: an angled side wall; a top aperture; and a gas-permeable, liquid impermeable bottom comprising at least one concave surface, wherein at least a portion of the bottom is transparent and wherein at least a portion of the bottom comprises a low-adhesion or no-adhesion material in or on the at least one concave surface, wherein the angled side wall has a decreasing diameter from the chamber's top aperture to the bottom; and a chamber annex for receiving a pipette tip for aspiration, the chamber annex comprising an integral surface adjacent to and in fluid communication with the chamber, wherein the chamber annex is not physically separated from the chamber, the chamber annex having a second bottom spaced away and at an elevation above the gas-permeable, liquid impermeable bottom, wherein the second bottom deflects fluid dispensed from a pipette away from the gas-permeable, liquid impermeable bottom, and wherein the chamber annex integral surface is angled with the chamber's angled side wall. ### Claim 2 (depends on 1) The article of claim 1 further comprising a liner having a porous membrane situated within a portion of the chamber to divide the chamber into an upper chamber and a lower chamber. ### Claim 3 (depends on 1) The article of claim 1 wherein the article comprises from 1 to about 2,000 of said chamber, wherein each chamber is physically separated from any other chamber. ### Claim 4 (depends on 1) The article of claim 1 wherein the at least one concave surface comprises a plurality of concave surfaces within the same chamber. ### Claim 5 (depends on 1) The article of claim 1 wherein the at least one concave surface comprises a hemi-spherical surface, a conical surface having a taper of 30 to about 60 degrees from the side wall to the bottom, or a combination thereof. ### Claim 6 (depends on 1) The article of claim 1 wherein the side wall surface comprises a vertical cylinder, a portion of a vertical conic of decreasing diameter from the chamber's top to the bottom, a vertical square shaft having a conical transition to the at least one concave bottom, or a combination thereof. ### Claim 7 (depends on 1) The article of claim 1 wherein the at least one concave surface comprises a hemisphere, or a portion thereof, having a diameter of from about 250 to about 5,000 microns. ### Claim 8 (depends on 1) The article of claim 1, further comprising culture media and a spheroid in said chamber. ### Claim 9 (depends on 1) The article of claim 1, wherein said angled side wall is adjacent to the portion of the bottom that is transparent. ### Claim 10 (depends on 1) The article of claim 1, further comprising one or more auxiliary chambers in fluid communication with said chamber. ### Claim 11 (depends on 1) A perfusion plate apparatus comprising: at least one cell culture article of claim 1; a media source well in fluid communication with the chamber of the at least one cell culture article that controllably provides a source of fresh media to the chamber; and a waste well in fluid communication with the chamber that controllably receives waste media from the chamber. ### Claim 12 (depends on 11) The apparatus of claim 11 further comprising a porous liner situated within a portion of the chamber to form an upper chamber and a lower chamber, the porous liner providing separation of a second cellular material in the upper portion of the chamber, from a first cellular material in the lower chamber. ### Claim 13 (depends on 11) The apparatus of claim 11 further comprising: a perfusion plug between the source well and the chamber, a perfusion plug between the chamber and the waste well, or both. ### Claim 14 (depends on 11) The apparatus of claim 11 wherein the at least one concave surface comprises a plurality of adjacent concave arcuate surfaces. ### Claim 15 (depends on 1) A method of making the article of claim 1 comprising: combining the gas-permeable, liquid impermeable, bottom and the angled side wall to form the chamber with the top aperture. ### Claim 16 (depends on 15) The method of claim 15 wherein combining is accomplished with: injection molding, thermal reforming, post forming, distortion printing, over molding, or combinations thereof. ### Claim 17 (depends on 15) The method of claim 15 wherein the angled side wall comprises an opaque side wall material, and wherein the chamber includes a distortion collar comprising a wall that surrounds the bottom, wherein the distortion collar is integral with or attached to the bottom, and wherein the distortion collar prevents the opaque side wall material from entering the bottom. ### Claim 18 (depends on 15) The method of claim 15 further comprising inserting a porous membrane in the chamber of the resulting article. ### Claim 19 (depends on 1) A method of culturing spheroids comprising: charging the article of claim 1 with culture media; and adding spheroid forming cells to the culture media. ### Claim 20 (depends on 19) The method of claim 19 further comprising optically examining the cultured spheroid forming cells through the bottom.