No, there is no back pay for wages while suspended, unless you had a written employment contract (including a union or collective bargaining agreement) and you were suspended in violation of your rights under the agreement. Otherwise, without such a contract, employment is employment at will, and an employer has the right to suspend an employee whenever, and for however long, they like. You can only, if you have been suspended so long that you believe you have been terminated, file for unemployment on the basis of "constructive", or effective, termination; or simply quit/resign and move on to the next job.