John L Madeira, 80Naples, FL

7966909, Jun 28, 2011

Jul 25, 2007

11/881288

John Madeira - Assonet MA, US
Arutiun Papken Ehiasarian - Sheffield, GB
Papken Ehiasar Hovsepian - Sheffield, GB
Krassimir Grigorov Marchev - Sudbury MA, US
Neville Sonnenberg - Newton MA, US

The Gillette Company - Boston MA

B21K 11/00
B26B 21/54

761041, 3034653, 3034654

The present invention relates to a process for forming a razor blade. The process includes the steps of: a) providing a substrate, b) forming a wedge-shaped sharpened edge on the substrate that has an included angle of less than thirty degrees and a tip radius of less than 1,000 angstroms, c) placing the substrate in a vacuum chamber, d) placing a first solid target in the vacuum chamber, e) providing a gas to be ionized in the vacuum chamber, and f) generating ions from the first solid target by applying a negative voltage to the first solid target in pulses, the ions forming a thin film coating on the wedge-shaped sharpened edge on the substrate.

2010001, Jan 21, 2010

Jul 16, 2008

12/174093

Joseph Allan DePuydt - Scituate MA, US
Steve S. Hahn - Wellesley MA, US
John Madeira - Assonet MA, US
Krassimir Grigorov Marchev - Sudbury MA, US
Kenneth James Skrobis - Maynard MA, US
Neville Sonnenberg - Newton MA, US

B26B 21/00

30 50

Razors cartridges including a guard, a cap, and at least two blades with parallel sharpened edges located between the guard and cap are provided. A first blade defines a blade edge nearest the guard and a second blade defines a blade edge nearest the cap. The first blade has a cutter force less than the cutter force of the second blade.

2010001, Jan 21, 2010

Jul 16, 2008

12/174058

Oliver H. Claus - Walpole MA, US
Joseph Allan DePuydt - Scituate MA, US
Steve S. Hahn - Wellesley MA, US
Yongqing Ju - Medfield MA, US
John Madeira - Assonet MA, US
Krassimir Grigorov Marchev - Sunbury MA, US
Kenneth James Skrobis - Maynard MA, US
Neville Sonnenberg - Newton MA, US
Charles Samuel White - Lynnfield MA, US

B26B 21/58

3034654

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.

2011001, Jan 20, 2011

Jul 17, 2009

12/504991

John Madeira - Assonet MA, US
Neville Sonnenberg - Newton MA, US

B26B 21/60
C23F 1/00

3034654, 216 37

A novel application of the atomic layer deposition (ALD) process for producing a conformal coating on a razor blade is disclosed where a uniform, conformal, dense coating is deposited on an entire surface of a blade flank and at least a portion or an entire surface of a blade body. To improve the shaving ability of the coated blade edge (e.g., decrease the blade tip radius), the ALD-produced coating may be etched during, after, or both during and after, the ALD process.

2011020, Sep 1, 2011

May 12, 2011

13/105958

John Madeira - Assonet MA, US
Arutiun Papken Ehiasarian - Sheffield, GB
Papken Ehiasar Hovsepian - Sheffield, GB
Krassimir Grigorov Marchev - Sudbury MA, US
Neville Sonnenberg - Newton MA, US

C23C 14/34

20419216

The present invention relates to a process for forming a razor blade. The process includes the steps of: a) providing a substrate, b) forming a wedge-shaped sharpened edge on the substrate that has an included angle of less than thirty degrees and a tip radius of less than 1,000 angstroms, c) placing the substrate in a vacuum chamber, d) placing a first solid target in the vacuum chamber, e) providing a gas to be ionized in the vacuum chamber, and f) generating ions from the first solid target by applying a negative voltage to the first solid target in pulses, the ions forming a thin film coating on the wedge-shaped sharpened edge on the substrate.

5232568, Aug 3, 1993

Jun 24, 1991

7/719793

C. Robert Parent - Westwood MA
John Madeira - Assonet MA
Steve S. Hahn - Wellesley Hills MA

The Gillette Company - Boston MA

C23C 1434

2041923

A razor blade includes a substrate with a wedge-shaped edge, a layer of molybdenum on the tip and flanks of the wedge-shaped edge, the thickness of the molybdenum layer preferably being in the range of about 50-500 angstroms, and a layer of diamond or diamond-like material on the molybdenum layer that preferably has a thickness of about 200-2,000 angstroms and that defines a tip radius of less than about 500 angstroms, an aspect ratio in the range of 1:13-3:1, a hardness of at least thirteen gigapascals and an L5 wet wool felt cutter force of less than 0. 8 kilogram.

5295305, Mar 22, 1994

Jan 25, 1993

8/008396

Steve S. Hahn - Wellesley Hills MA
John Madeira - Assonet MA

The Gillette Company - Boston MA

B26B 2100
B26B 2154

30 50

A razor blade includes a substrate with a wedge-shaped edge, an interlayer of material selected from the group consisting of silicon, silicon carbide, vanadium, tantalum, nickel, niobium, and niobium-molybdenum alloy and alloys of such materials on the tip and flanks of the wedge-shaped edge, the thickness of the interlayer preferably being in the range of about 50-500 angstroms, and a layer of diamond or diamond-like carbon material on the interlayer that preferably has a thickness of about two thousand angstroms and that defines a tip radius of less than about 1000 angstroms.

2017012, May 11, 2017

Jan 25, 2017

15/415147

- Boston MA, US
John Madeira - Assonet MA, US

B26B 21/60
B26B 21/56
C23C 8/38

A razor blade including a substrate with a cutting edge, the substrate includes a mixed nitride-substrate interregion disposed at or beneath a surface of the substrate, the mixed nitride-substrate interregion being substantially free of a compound layer.