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How can you date your historic Upjohn product? There are some
resources to achieve that.
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The company name changed in November 1902 from "The
Upjohn Pill and Granule Company" to "The Upjohn Company".
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There were 7 logos over the company lifetime –
1886, 1894, 1907, 1913, 1938, 1945 and 1961. There is a
page showing them
on the web site.
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There is a list of
all products from 1886 to 1950,
with the years that they were sold.
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The Fluids Production log books from
1923 to 1939 still exist. They show individual batch numbers.
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One tablet/pill manufacturing log book from the 1910s
has survived. For tablet/pill manufacturing batch numbers:
On 5 Dec 1911 batch # was 19282
On 7 Dec 1915 batch # was 26698
On 14 Nov 1916 batch # was 28550
So 7416 batches were manufactured in 4 years, which is
1854 batches per year. Assuming this number has remained about
the same each year then the numbering of tablet/pill batches may
have started around 1901.
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July 1st, 1963 was when zip codes
were introduced and used on company labels.
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