Company Filing History:
8 out of 7,865 
1 out of 832,843 Years Active: 1976-1992
Title: The Innovative Contributions of Norman P. Sweeny
Introduction
Norman P. Sweeny is a notable inventor based in North Oaks, MN (US). He has made significant contributions to the field of chemistry, particularly through his innovative patents. With a total of 9 patents, Sweeny has developed unique compounds and compositions that have practical applications in various industries.
Latest Patents
One of Sweeny's latest patents is focused on monosubstituted dithiooxamide compounds and their use. This invention concerns monosubstituted dithiooxamides, with a preferred class comprising those wherein the substituent results in a dithiooxamide derivative that is substantially nonvolatile at about room temperature. The preferred materials are those for which, when the monosubstituted dithiooxamide is complexed with a transition metal cation, the resulting polymer is substantially dark, preferably blue or blue-black in color. Additionally, carbonless paper constructions involving the use of N-(monosubstituted)dithiooxamides to advantage are described in this patent.
Another significant patent by Sweeny involves cosmetic colorant compositions. These cosmetic compositions have modifiable color characteristics. A single composition may be applied, and with the application of pressure, the color of the composition may change. This innovative composition contains a first pigment and microcapsules containing a second pigment. Upon rupture of the microcapsules, the coloration of the second pigment is added to the composition, altering its color characteristics.
Career Highlights
Throughout his career, Sweeny has worked with prominent companies, including Minnesota Mining and Manufacturing Company. His work has contributed to advancements in both chemical applications and consumer products.
Collaborations
Sweeny has collaborated with notable individuals in his field, including Karl Friedrich Thom and Keith E. Relyea. These collaborations have likely enriched his work and led to further innovations.
Conclusion
Norman P. Sweeny is a distinguished inventor whose contributions to the field of chemistry have resulted in valuable patents and innovative products. His work continues to influence various industries, showcasing the importance of creativity and research in driving advancements.