# US 10,500,748 B2 · Chemically sharpened blades > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,500,748 B2 - Document ID: US10500748B2 - Status: Granted - Kind: B2 - Application number: 15/057,674 - Filed: 2016-03-01 - Published: 2016-09-08 - Granted: 2019-12-10 - Earliest claimed: 2015-03-02 - Assignees: Hutchinson Technology Incorporated - Applicants: Hutchinson Technology Incorporated - Inventors: Paul V. Pesavento; Peter F. Ladwig; Michael W. Davis; John A. Theget; Kurt C. Swanson; Joel B. Michaletz; Philip W. Anderson; Timothy A. McDaniel - Web page: https://patentgrep.com/patent/US10500748B2 ## CPC - B26D 1/0006: {Cutting members therefor} - B26B 9/00: Blades for hand knives - B26B 9/02: characterised by the shape of the cutting edge, e.g. wavy - C23F 1/04: Chemical milling - B26D 2001/0053: {having a special cutting edge section or blade section} - B26D: CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING (for growing crops or plants A01D, A01G; for fodder or straw A01F; for bulk butter A01J; for dough A21C; slaughtering A22B; for tobacco, cigars or cigarettes A24; marking-out, perforating or making buttonholes A41H25/00; manufacturing footwear A43D; brushmaking A46D; surgery A61B; disintegrating, mincing or shredding in general B02C; cutting wire, making pins or nails B21F, B21G; of the kind used formetal B23; cutting by abrasive fluid jets B24C5/02; hand-held cutting tools B26B; perforating, cutting-out, stamping-out or punching, or severing by means other than cutting B26F; for wood B27; for stone B28D; working of plastics or substances in a plastic state B29; making boxes, cartons, envelopes or bags, of paper or similarly worked materials, e.g. metal foil, B31B; article or web delivery apparatus incorporating cutting or line-perforating devices B65H35/00; for leather or upholstery B68, C14B; for glass C03B; making matches C06F; for peat C10F; for sugar C13B45/00; for textile materials D06H; civil engineering, building, mining, see Section E; for light guides G02B6/25; cutting processed photographic material G03D15/04) - B26B: HAND-HELD CUTTING TOOLS NOT OTHERWISE PROVIDED FOR (for harvesting A01D; for horticulture, for forestry A01G; for butchering or meat treatment A22; for manufactering or repairing footwear A43D; nail clippers or cutters A45D29/02; kitchen equipment A47J; {vegetable slicers, julienne cutters and similar devices and holders therefor, B26D3/28}; for surgical purposes A61B; for metal B23D; cutting by abrasive fluid jets B24C5/02; plier-like tools with cutting edges B25B7/22; pincers B25C11/02; handles for hand implements, in general B25G; guillotine-type cutters B26D; {perforating by non-mechanical means, e.g. by fluid jet, B26F1/26}; for erasing B43L19/00; for textile materials D06H) - C23F: NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE (working metal by laser beams B23K26/00; desurfacing by applying flames B23K7/00; working of metal by electro-erosion B23H; producing decorative effects by removing surface material, e.g. by engraving, by etching, B44C1/22; electrolytic etching or polishing C25F); INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25 ## Abstract A chemically etched cutting tool includes a metal base having a first side and a second side, and a chemically etched blade on at least one side of the metal base, the chemically etched blade forming a cutting edge at the intersection of the first side of the chemically etched blade and the second side of the chemically etched blade. The first side of the chemically etched blade includes one or more concave portions and one or more convex portions with at least one inflection point between the concave portions and one or more convex portions. The second side of the chemically etched blade includes one or more concave portions and one or more convex portions with at least one inflection point between the concave portions and one or more convex portions. ## Claims ### Claim 1 A chemically etched cutting tool comprising: a metal base having a centerline dividing a first side and a second side; and a chemically etched blade on the metal base, the chemically etched blade forming a cutting edge at an intersection of a first side of the chemically etched blade that corresponds to the first side of the metal base and a second side of the chemically etched blade that corresponds to the second side of the metal base, wherein the first side of the chemically etched blade includes at least two repeating profiles, each profile includes a proximal convex portion and a distal concave portion, with an inflection point between the cutting edge and the proximal convex portion and between the proximal convex portion and the distal concave portion, and wherein the second side of the chemically etched blade includes at least two repeating profiles so that the first side of the chemically etched blade and the second side of the chemically etched blade are symmetric at the centerline of the metal base. ### Claim 2 (depends on 1) The chemically etched cutting tool of claim 1, wherein at least one of the first side of the chemically etched blade and the second side of the chemically etched blade includes a scalloped surface. ### Claim 3 (depends on 2) The chemically etched cutting tool of claim 2, wherein the scalloped surface was formed by etching the metal base through at least one variable permeability mask. ### Claim 4 (depends on 3) The chemically etched cutting tool of claim 3, wherein the at least one variable permeability mask comprises a mask having a comb profile. ### Claim 5 (depends on 2) The chemically etched cutting tool of claim 2, wherein the cutting edge is a serrated cutting edge, and wherein a distance between adjacent serrations of the cutting edge is at least three times larger than a distance between adjacent scallops on the scalloped surface. ### Claim 6 (depends on 5) The chemically etched cutting tool of claim 5, wherein the distance between adjacent scallops on the scalloped surface is at least 50 micrometers and the distance between adjacent serrations of the cutting edge is at least 500 micrometers. ### Claim 7 (depends on 1) The chemically etched cutting tool of claim 1, wherein the metal base is a stainless steel metal base. ### Claim 8 (depends on 1) The chemically etched cutting tool of claim 1, wherein cutting edge is a serrated cutting edge. ### Claim 9 (depends on 1) The chemically etched cutting tool of claim 1, wherein the at least one inflection point between the concave portions and the convex portions of the first side includes at least two inflection points between the concave portions and the convex portions. ### Claim 10 (depends on 1) The chemically etched cutting tool of claim 1, wherein the at least one inflection point between the concave portions and the convex portions of the second side includes at least two inflection points between the concave portions and the convex portions. ### Claim 11 (depends on 1) The chemically etched cutting tool of claim 1, wherein the first and second sides of the chemically etched blade represent two bevels located the first and second sides of the metal base. ### Claim 12 (depends on 1) The chemically etched cutting tool of claim 1, wherein a thickness of the metal base is less than 1000 micrometers. ### Claim 13 (depends on 1) The chemically etched cutting tool of claim 1, wherein a thickness of the metal base is less than 500 micrometers. ### Claim 14 (depends on 1) The chemically etched cutting tool of claim 1, wherein a thickness of the metal base is between 250 micrometers and 500 micrometers. ### Claim 15 (depends on 1) The chemically etched cutting tool of claim 1, wherein the first side of the chemically etched blade and the second side of the chemically etched blade form a tip angle between 20 degrees and 35 degrees.