"As with most successful products, Vaseline had its imitators, especially since the formula was not patented. Although the trade mark offered protection for the word “Vaseline,” the term “petroleum jelly” was descriptive. Descriptive terms were exempt from trademark protection. Thus, other firms began to market petroleum jelly. One fairly successful imitator was the St. Joseph’s Laboratories, with plants at New York and Memphis. The product was called St. Joseph’s Moroline Petroleum Jelly. The early colorless jars were unusual in shape . . . "
- Bill Lockhart, A Tour in Time through Vaseline Jars
Moroline jar 1931-1940, found on a permission in Levy County