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Credit card system and method

  • US 6,636,833 B1
  • Filed: 01/22/1999
  • Issued: 10/21/2003
  • Est. Priority Date: 03/25/1998
  • Status: Expired due to Term
First Claim
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1. A credit card system, comprising:

  • means for maintaining a pool of credit card numbers which share identical formatting;

    means for assigning at least one credit card number from said pool of credit card numbers to be a master credit card number;

    means for assigning at least one credit card number from said pool of credit card numbers to be a limited-use credit card number which is deactivated upon a use-triggered condition which occurs subsequent to assignment of said at least one credit card number;

    means for associating said master credit card number with said limited-use credit card number, while ensuring that said master credit card number cannot be discovered on the basis of said limited-use credit card number;

    means for determining whether to deactivate the limited-use credit card number when said limited-use credit card number was used to perform a transaction, and for generating a deactivation command in response thereto, wherein said means for determining whether to deactivate the limited-use credit card number determines whether a limited-use event pertaining to the use of the limited-use credit card number has occurred, and if so, generates said deactivation command when said limited-use event has occurred; and

    means for deactivating the limited-use credit card number based on the deactivation command wherein said limited-use credit card number is valid for a predetermined number of payments for a transaction with a single merchant.

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