# US 8,551,390 B2 · Electrospinning apparatus, methods of use, and uncompressed fibrous mesh > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 8,551,390 B2 - Document ID: US8551390B2 - Status: Granted - Kind: B2 - Application number: 13/081,820 - Filed: 2011-04-07 - Published: 2011-10-13 - Granted: 2013-10-08 - Earliest claimed: 2010-04-12 - Assignees: The UAB Foundation - Applicants: Ho-Wook Jun; Ajay Tambralli; Bryan Adam Blakeney; Derrick Dean - Inventors: Ho-Wook Jun; Ajay Tambralli; Bryan Adam Blakeney; Derrick Dean - Web page: https://patentgrep.com/patent/US8551390B2 ## CPC - D01D 5/0076: {characterised by the collecting device, e.g. drum, wheel, endless belt, plate or grid (D01D5/0046 takes precedence)} - D01D 5/0092: {characterised by the electrical field, e.g. combined with a magnetic fields, using biased or alternating fields} - D01D: MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS ## Abstract Embodiments of the present disclosure provide electrospinning devices, methods of use, uncompressed fibrous mesh, and the like, are disclosed. ## Claims ### Claim 1 An electrospinning apparatus, comprising a device that a fiber is drawn from, wherein the tip of the device from where the fiber is drawn is at a first potential, and a structure that includes a plurality of conductive probes, wherein each probe has a distal end, wherein a portion of each probe extends from a non-conductive surface of the structure, wherein a first set of the distal ends are recessed relative to a second set of distal ends, wherein the first set and the set of distal ends form a first boundary of a target volume, wherein a second boundary of the target volume is not bound by the distal ends of the plurality of the probes, wherein the device is positioned adjacent the second boundary, wherein the conductive probes are at second potential, wherein there is a potential difference between the first potential and the second potential that causes the fiber to be directed to the target volume through the second boundary. ### Claim 2 (depends on 1) The apparatus of claim 1, wherein the first set of the distal ends are further away from the tip of the structure than the second set of the distal ends. ### Claim 3 (depends on 1) The apparatus of claim 1, wherein the first boundary of the target volume has a cross-sectional shape selected from: a substantially concave shape, a substantially cone shape, a substantially hemi-spherical shape, a substantially semi-spherical shape, an arcuate shape, a semi-polygonal shape, a substantially V-shape, a substantially C-shape, and a substantially U-shape, wherein the first set of the distal ends are further away from the tip of the structure than the second set of the distal ends. ### Claim 4 (depends on 1) The apparatus of claim 1, wherein the first boundary of the target volume has a three dimensional shape selected from: a substantially cone shape, a substantially hemi-spherical shape, and a substantially semi-spherical shape, wherein the first set of the distal ends are further away from the tip of the structure than the second set of the distal ends. ### Claim 5 (depends on 1) The apparatus of claim 1, wherein the non-conductive surface is a flat surface. ### Claim 6 (depends on 5) The apparatus of claim 5, wherein the plurality of probes includes at least two groups of probes that are the not same length. ### Claim 7 (depends on 1) The apparatus of claim 1, wherein the non-conductive surface is a non-flat surface. ### Claim 8 (depends on 7) The apparatus of claim 7, wherein the non-conductive surface has a cross-sectional shape selected from: a substantially concave shape, an arcuate shape, a substantially V-shape, a substantially C-shape, and a substantially U-shape. ### Claim 9 (depends on 7) The apparatus of claim 7, wherein the non-conductive surface has a three-dimensional shape selected from: a substantially cone shape, a substantially hemi-spherical shape, a substantially semi-spherical shape, wherein the first set of the distal ends are further away from the tip of the structure than the second set of the distal ends. ### Claim 10 (depends on 9) The apparatus of claim 9, wherein the plurality of probes are the same length. ### Claim 11 (depends on 10) The apparatus of claim 10, wherein the plurality of probes includes at least two groups of probes that are the not same length. ### Claim 12 (depends on 1) The apparatus of claim 1, wherein the plurality of probes are at the same potential. ### Claim 13 (depends on 1) The apparatus of claim 1, wherein the one or more of the plurality of probes are at the different potential than one or more of the other of the plurality of probes. ### Claim 14 (depends on 1) The apparatus of claim 1, wherein the target volume has a longest dimension and a second dimension that is perpendicular the longest dimension at the widest point, wherein the longest dimension is about 5 to 50 cm, wherein the second dimension is about 3 to 50 cm, and wherein the target volume is about 15 to 2500 cm3. ### Claim 15 (depends on 1) The apparatus of claim 1, wherein the plurality of probes includes about 0.1 to 4 probes per square cm. ### Claim 16 (depends on 1) The apparatus of claim 1, wherein each probe has a length that extends from the non-conductive surface of the structure that is about 0.5 to 10 cm, wherein the diameter of the probe is about 100 μto 0.5 cm. ### Claim 17 (depends on 1) The apparatus of claim 1, wherein the device includes a syringe. ### Claim 18 (depends on 1) The apparatus of claim 1, wherein the height of the nonconductive structure is about 5 to 10 cm, wherein the depth of the nonconductive structure is about 5 to 75 cm, and wherein the width of the nonconductive structure is about 5 to 100. ### Claim 19 A method of forming an uncompressed fibrous mesh, comprising: applying a potential difference between a tip of a device and a plurality of conductive probes on a structure, wherein each probe has a distal end, wherein a portion of each probe extends from a non-conductive surface of the structure, wherein a first set of the distal ends are recessed relative to a second set of distal ends, wherein the first set and the set of distal ends form a first boundary of a target volume, wherein a second boundary of the target volume is not bound by the distal ends of the plurality of the probes; drawing a fiber from the tip towards the target volume through the second boundary; and forming the uncompressed fibrous mesh in the target volume. ### Claim 20 (depends on 19) The method of claim 19, wherein the potential is about 5 kV to 60 kV. ### Claim 21 (depends on 19) The method of claim 19, wherein the fiber has a diameter of about 1 to 1000 nm. ### Claim 22 (depends on 19) The method of claim 19, wherein the target volume is about 15 to 2500 cm3. ### Claim 23 (depends on 19) The method of claim 19, wherein the uncompressed fibrous mesh has a volume that is about 50 to 1800 cm3, wherein the fiber occupies about 5 to 20% of the volume of the uncompressed fibrous mesh. ### Claim 24 (depends on 19) The method of claim 19, wherein the potential is about 5 kV to 60 kV, wherein the target volume is about 15 to 2500 cm3, wherein the uncompressed fibrous mesh has a porosity of about 80 to 90%, wherein the uncompressed fibrous mesh has a volume that is about 50 to 1800 cm3, and wherein the fiber occupies about 5 to 20% of the volume of the uncompressed fibrous mesh.