\documentclass[12pt]{article}
\usepackage[margin=0.75in]{geometry}
\usepackage{amsmath}
\usepackage{sansmathfonts}
\usepackage{wallpaper}
\pagestyle{empty}

\begin{document}
\ThisCenterWallPaper{1}{gh}
\begin{center}
\sffamily
\Huge\textbf{GRADUATE SEMINAR}

\bigskip
\LARGE\textbf{Name}

\bigskip
\textbf{Title}

\bigskip
\large
\textit{PhD Student supervised by}
%or
%\textit{MSc Student supervised by}

\Large
\bigskip
\textbf{Date
\\Time
\\Location
}
\end{center}

\bigskip

\sffamily\large\noindent\textbf{Abstract:} 

%Place text of abstract here

 \end{document}