Abstract: A system and method for facilitating the purchase of digital lottery tickets, the validation of digital lottery tickets, and the redemption of digital lottery tickets. The systems and methods provide improved security and protection against fraudulent validation and redemption of digital lottery tickets.

Abstract: A system and method for facilitating the purchase of digital lottery tickets, the validation of digital lottery tickets, and the redemption of digital lottery tickets. The systems and methods provide improved security and protection against fraudulent validation and redemption of digital lottery tickets.

Abstract: A system and method for facilitating the purchase of digital lottery tickets, the validation of digital lottery tickets, and the redemption of digital lottery tickets. The systems and methods provide improved security and protection against fraudulent validation and redemption of digital lottery tickets.

Abstract: Method for production of new, thermal and chemical resistant polyurethane plastics, particularly in the form of foams, these foams being obtained from the reaction of di- or poly- isocyanates with polyols, said polyols having the formula 1 or 2 as herein described, Ar in the said formulas representing a benzene, naphthalene or anthracene ring, which may be singly or multiply substituted with a halogen atom, alkyl radical, aryl radical or allyl radical, Z representing the oxygen atom, a group SO.sub.2 or a divalent radical --CRR.sub.1 -- where R and R.sub.1 represent a hydrogen atom or an alkyl radical, m and r represent 0 or 1, and n and p represent an integer 1-10, or their mixtures with other low-viscosity polyols or with a compound having formula 3 as herein described in which R.sub.2 represents a simple or branched alkyl or aryl radical which can be substituted by a lower alkyl or aryl radical or by halogen atoms added in a quantity of 0.