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    ALKALINE DRY-CELL PATENT
    November 15, 1960 - U.S.A.

    A U.S. patent was issued for an alkaline dry-cell to P.A. Marsal, Karl Kordesch and Lewis F. Urry who assigned it to the Union Carbide Corporation, the manufacturer of Eveready batteries (No. 2,960,558). Compared to the existing carbon-zinc dry-cells, it offered an appreciable increase in life-span and efficiency during heavy continuous drains. Its construction used an alkaline electrolyte, manganese dioxide as depolarizer, a zinc powder-gel anode, and certain additives such including mercury and electrolyte-creep inhibitors. The patent gave practical details for commercial production. The patent claimed that whereas four cells in series of the carbon-zinc type gave 4.5 volts to power a 1.25-amp bulb for 45-min to 1-hr, the new alkaline design gave good brilliance after 6 to 7 hours.

    DRY-CELL PATENT
    November 15, 1887 - U.S.A.

    German scientist, Dr. Carl Gassner, was issued a U.S. patent (No. 373,064), the first in the U.S. for a "dry" cell. Gassner had already patented his invention in Germany (No. 37,758) on 8 Apr 1886, and also in Austria, Belgium, England, France and Hungary in the same year. The sealed zinc shell which contained all the chemicals was also the negative electrode. Later, he improved the shelf life of the battery by adding zinc chloride to the electrolyte to reduce corrosion of the zinc shell. Gassner's battery was much like the carbon-zinc, general-purpose batteries sold today. By 1896, the National Carbide Company (later Union Carbide and Eveready) produced the first consumer dry cell battery. Two years later, the company made the first D cell.

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Website preview thumbnail for : Independent Eye Care
Was founded in 1999, and since that time has been owned and operated by optometrist Dr Anthony Seymour and optician Shawn Blades. The goal from the outset has been to provide the personal service a...
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Website preview thumbnail for : Wholesale Sunglasses
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Website preview thumbnail for : Kornmehl Laser Eye Associates
Dr. Ernest Kornmehl and his staff are dedicated to providing the highest quality laser eye surgery in Boston. As an experienced eye surgeon, Dr. Kornmehl is focused on providing advanced treatments...
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Website preview thumbnail for : Oakley Sunglasses
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Website preview thumbnail for : JC Penney Optical
Looking for a wide variety of eyeglasses and sunglasses for men, women and kids. JCPenney Optical is your source for high quality fashion frames, lenses, sunglasses, and contact lenses at discounte...
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Website preview thumbnail for : Glasses Experts
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Reglaze existing glasses with your favourite pair of prescription spectacles that have broken lens or need a new prescription by selecting from the same wide range of prescription lenses and glasse...
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Website preview thumbnail for : The Sunglass Fix
The Sunglass Fix makes premium replacement lenses for sunglasses. We manufacture and source quality lenses and shape them to fit all sunglass makes and models. High Clarity Lenses $28.95 AUD and Po...
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Website preview thumbnail for : Laser Sight
Laser eye surgery vision correction and Lasik specialists in Australia. Have your laser eye surgery with Laser Sight. We offer safe and up-to-date refractive procedures with over 45,000 successful ...
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Personality is the epitome of your beauty, can be credited with more elevated platform with the use of contact lenses.
Colored contact lenses are a great way to sharpen and enhance the look of your eyes. Unlike traditional contacts, colored lenses are a great way to show off your contacts, with colors that are completely fun. You can have a lot of fun with colored lenses “especially when you show them off to friends and family“ who don't know you have them.
Over the last several years, there have been many improvements in contact lenses. As a whole, contacts are the best alternative to wearing glasses. They are comfortable, don't hang off your face, and above all, they are affordable.

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Website preview thumbnail for : Aalsmeer Web Dir
Worldwide business listings web directory Website submissions human reviewed business web index company directory with directory search.
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Carvers for Conservation was started to introduce the people conserving the habitat of migratory birds to the premier bird sculptors in the world. My intention was to be mutually beneficial to the ...
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Komfortable Nichtraucher Ferienwohnung im Herzen vom schoenen Fischerdorf Greetsiel.
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Offers vintage look chains, clasps and earring findings, jewelry stampings, tools and glue.
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