Cutlery – Razors – Multiple blade
Reexamination Certificate
2007-01-05
2009-11-03
Ashley, Boyer D (Department: 3724)
Cutlery
Razors
Multiple blade
C030S076000, C030S077000, C030S084000
Reexamination Certificate
active
07610683
ABSTRACT:
A razor blade unit for safety razor has optimized shape and dimensions for body shaving, especially the regions of the axillae. The blade unit has an elongate blade with a rectilinear sharpened edge, and a skin contacting surface at which the length is 1 to 4 times the width and not greater than about 60 mm, e.g., 40 to 45 mm. The skin contacting surface has a footprint area of at least 450 mm2, e.g., 600 to 750 mm2, and a circularity which is not less than the lower of (i) 65%, and (ii) the circularity of a rectangle with the same length and width as the skin contacting surface and with corner radii of 30% of the width. In a plane perpendicular to the blade edge the skin contacting surface is convex and shaped to make at least a three point contact with an imaginary circumscribing circle with a radius of 15 to 70 mm, e.g., 25 mm. Guard cap surfaces in front of and behind the blade edge each have a skin contact area of at least 140 mm2,and their combined area is preferably at least 400 mm2, e.g., 450 to 500 mm2. A useful shape is rectangular with semi-circular ends.
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Picture of Wilkinson “Classic®” Razor alleged circa 1980's, side view in exhibit No. K9 to Nullity proceeding of Wilkinson in the matter of European patent EP 0 868 267 B1 (1 page).
Picture of package rear panel of Wilkinson “Classic” razor purchased in Germany in Jun. 2004 resembling Classic razor in “BI” above and illustrating plastic guard seat formed with the handle, a removable blade, and removable screwed on plastic top cap (1 page).
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Brown Frank Edward
Oldroyd Brian
Ashley Boyer D
Flores-Sánchez Omar
Johnson Kevin C.
Lipchitz John M.
Miller Steven W.
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