Razor blades

US9079321B2 · kind B2 · utility

Assignee

• The Gillette Company LLC · US

Inventors

• Oliver Claus · Laichingen, DE
• Joseph Allan DePuydt · Quincy, US
• Steve S. Hahn · Wellesley, US
• Yongqing Ju · Medfield, US
• John Madeira · Freetown, US
• Krassimir Grigorov Marchev · Sudbury, US
• Kenneth James Skrobis · Maynard, US
• Neville Sonnenberg · Newton, US
• Charles S. White · Princeton, US

Key dates

• Filing date: Jul 16, 2008
• Grant date: Jul 14, 2015
• Expiry date: May 25, 2032

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B26B21/58
• WIPO field: Machine tools
• WIPO sector: Mechanical engineering

Abstract

A razor blade having a substrate with a cutting edge being defined by a sharpened tip. The substrate has a thickness of between about 1.3 and 1.6 micrometers measured at a distance of four micrometers from the blade tip, a thickness of between about 2.2 and 2.7 micrometers measured at a distance of eight micrometers from the blade tip, a thickness of between about 3.8 and 4.9 micrometers measured at a distance of sixteen micrometers from the blade tip, a ratio of thickness measured at four micrometers from the blade tip to the thickness measured at eight micrometers from the blade tip of at least 0.55 and a ratio of thickness measured at four micrometers from the blade tip to the thickness measured at sixteen micrometers from the blade tip of at least 0.30.