Billie J Matthews, John P Allison, Paul S Woon, Robert A Stevens, Stephan R Bornslaeger: Sanitary napkin with improved comfort. Kimberly Clark Corporation, Howard Olevsky, R Jonathan Peters, Gregory E Croft, August 9, 1983: US04397644 (181 worldwide citation)

A sanitary napkin is provided which is capable of transmitting viscous menstrual fluid into the absorbent portion of the napkin without cover runoff. The napkin has a fluid permeable cover which is integrated with a portion of the absorbent matrix. This portion of the absorbent matrix is also design ...

John P Allison: Multi layer sanitary appliance. Kimberly Clark Corporation, July 30, 1985: US04531945 (58 worldwide citation)

A sanitary appliance such as a sanitary napkin is provided with at least three layers of absorbent material with the first and third layer being substantially identical and having areas of contact through at least one opening in the second layer.