Patent ID: 7559330

Claim:
A method of maintaining sharpness of razor blades comprising the steps of: providing a package of a plurality of razor blade cartridges, where each razor blade cartridge comprises a plurality of stacked and shifted parallel razor blades held in place by a structure; opening the package; removing a plurality of razor blade cartridges from the package and before any of said plurality of razor blade cartridges are used, causing the plurality of razor blade cartridges to be disposed within a cup and being completely covered with an oil solution; simultaneously storing the plurality of razor blade cartridges in the cup while the plurality of razor blade cartridges remain submerged in the oil solution; removing a first razor blade cartridge of the plurality of razor blade cartridges in the cup and using it for shaving while another of the plurality of razor blade cartridges remains in the cup and remains completely covered by the oil solution; and shaving with the first razor blade cartridge, removing material from the first razor blade cartridge and returning the first razor blade cartridge to the cup where it is completely covered with the oil solution.