Patents by Inventor Salah Lofty Ahmed Khalil

Salah Lofty Ahmed Khalil has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Composition and method of making shape memory polymer for biomedical applications
    Patent number: 9745427
    Abstract: Shape memory polymers (SMP) based on poly vinyl alcohol (PVA) in the presence of 2-carboxyethyl acrylate oligomers (CEA), multi-wall carbon nanotubes (MWCNTs) and cross linked by ionizing radiation were investigated. Chemical crosslinking by glutaraldehyde for PVA in the presence of CEA and MWCNTs was also studied. Radiation cross linked SMP exhibits good temperature responsive shape memory behavior as demonstrated by thermal properties of radiation investigated by dynamic mechanical analysis. Transition temperature at Tan ? of radiation cross linked SMP decreased significantly by 6 and 13° C. due to addition of MWCNTs. The developed SMP exhibited promising shape memory behavior of radiation cross linked SMP for biomedical applications between temperatures range of Tan ?. Results on the gel fraction revealed significant reduction in swelling and increase in gelation due to chemical cross linking with glutaraldehyde. The radiation cross linked SMP reached 100% gelation at an irradiation dose of 50 kGy.
    Type: Grant
    Filed: June 30, 2013
    Date of Patent: August 29, 2017
    Assignee: King Abdulaziz City for Science and Technology “KACST”
    Inventors: Ahmed Ali Basfar, Salah Lofty Ahmed Khalil