Apparatus and method to allow a user a trial period before licensing a software program product

• US 5,771,347 A
• Filed: 06/27/1996
• Issued: 06/23/1998
• Est. Priority Date: 05/20/1994
• Status: Expired due to Fees

• Current Assignee: International Business Machines Corporation
• Original Assignee: International Business Machines Corporation
• Inventors: Grantz, Jeffrey A., Ure, J. Robert
• Primary Examiner(s): Pan, Daniel H.
• Application Number:
  US08/671,228
• Time in Patent Office: 726 Days
• Field of Search: 395/800, 395/750, 395/186, 395/84, 395/491, 395/712, 395/557, 395/500, 395/200.11, 395/188.01, 395/289, 395/280, 395/560, 395/490, 364/DIG. 1, 364/DIG. 2, 364/491, 340/825.31, 380/4, 380/25, 380/30, 380/3, 379/289, 379/10
• US Class Current: 726/31
• CPC Class Codes: G06F 21/10 Protecting distributed programs or content, e.g. vending or licensing of copyrighted material protection in video systems or pay television H04N7/16 ; Digital rights management [DRM]

Abstract

A method is provided to permit copies of software products to be installed on systems, with a predetermined delay before commencement of a designated test period. The predetermined delay provides for a cumulative elapsed time, beginning with the installation of the software product to be evaluated during the designated test period, to allow for miscellaneous starts of the computer system prior to productive use for the purpose of evaluation during the user trial period. The miscellaneous starts may be associated with software product installation procedures during preload activities, attachment of devices and/or adapters to tailor the system to a particular user configuration, or to otherwise "boot" or check the system prior to productive use.

Claims

1. A method for preventing continued use of a protected computer program product in a data processing system beyond a test period, comprising the steps of:

determining that a predetermined amount of use of the data processing system has occurred, the predetermined amount of use indicating that productive use of the data processing system has begun;

responsive to the determination of the predetermined amount of use, setting the test period by storing a current date as a beginning of a designated test period;

periodically determining whether the designated test period has ended by comparison of a current date with the stored date; and

responsive to the determination that the designated test period has ended, causing the protected computer program product to be disabled.

2. The method as recited in claim 1 wherein the step of determining that a predetermined amount of use of the data processing system has occurred comprises the steps of:

starting a timer after the protected computer program product is installed;

incrementing the timer to measure a cumulative period of time that the data processing system is active; and

making a determination as to whether the timer has reached a predetermined value equivalent to the predetermined amount of use.

3. The method as recited in claim 1 wherein the step of storing the current date as the beginning of the designated test period comprises the steps of:

making a determination as to whether a date stamp has been created;

creating a date stamp from the current date if the predetermined amount of use has occurred; and

storing the date stamp in a memory of the data processing system.

4. The method as recited in claim 3 further comprising the step of providing an initial time setting for the timer at the time of installation of the protected computer program product in the data processing system.

5. The method as recited in claim 1 wherein the protected computer program product is preloaded in the data processing system.

6. The method as recited in claim 1 further comprising the steps of:

making a determination as to whether a valid password has been entered; and

responsive to the entry of a valid password, enabling the protected computer program product past the designated test period.

7. A data processing system including processor, memory and input device which prevents continued use of a protected computer program product in a data processing system beyond a test period, comprising:

means for determining that a predetermined amount of use of the data processing system has occurred, the predetermined amount of use indicating that productive use of the data processing system has begun;

means responsive to the determination of the predetermined amount of use for setting the test period by storing a current date as a beginning of a designated test period;

means for periodically determining whether the designated test period has ended by comparison of a current date with the stored date; and

means responsive to the determination that the designated test period has ended for causing the protected computer program product to be disabled.

8. The system as recited in claim 7 wherein the means for determining that a predetermined amount of use of the data processing system has occurred comprises:

means for starting a timer after the protected computer program product is installed;

means for incrementing the timer to measure a cumulative period of time that the data processing system is active; and

means for making a determination as to whether the timer has reached a predetermined value equivalent to the predetermined amount of use.

9. The method as recited in claim 8 further comprising means for providing an initial time setting for the timer at the time of installation of the protected computer program product in the data processing system.

10. The system as recited in claim 7 wherein the means for storing the current date as the beginning of the designated test period comprises:

means for making a determination as to whether a date stamp has been created;

means for creating a date stamp from the current date if the predetermined amount of use has occurred; and

means for storing the date stamp in a memory of the data processing system.

11. The system as recited in claim 8 wherein the protected computer program product is preloaded in the data processing system.

12. The system as recited in claim 7 further comprising the steps of:

means for making a determination as to whether a valid password has been entered; and

means responsive to the entry of a valid password for enabling the protected computer program product past the designated test period.

13. A protected computer program product on a computer readable medium for preventing continued use of the protected computer program product in a data processing system beyond a test period, comprising;

means for determining that a predetermined amount of use of the data processing system has occurred, the predetermined amount of use indicating that productive use of the processing system has begun;

means responsive to the determination of the predetermined amount of use for setting the test period by storing a current date as a beginning of a designated test period;

means for periodically determining whether the designated test period has ended by comparison of a current date with the stored date; and

means responsive to the determination that the designated test period has ended for causing the protected computer program product to be disabled.

14. The product as recited in claim 13 wherein the means for determining that a predetermined amount of use of the data processing system has occurred comprises:

means for starting a timer after the protected computer program product is installed;

means for incrementing the timer to measure a cumulative period of time that the data processing system is active; and

means for making a determination as to whether the timer has reached a predetermined value equivalent to the predetermined amount of use.

15. The method as recited in claim 14 further comprising means for providing an initial time setting for the timer at the time of installation of the protected computer program product in the data processing system.

16. The product as recited in claim 13 wherein the means for storing a current date as a beginning of the designated test period comprises:

means for making a determination as to whether a date stamp has been created;

means for creating a date stamp if said predetermined amount of use has occurred; and

means for storing the date stamp in a memory of the data processing system.

17. The product as recited in claim 13 wherein the protected computer program product is preloaded in the data processing system.

18. The product as recited in claim 13 further comprising:

means for making a determination as to whether a valid password has been entered; and

means responsive to the entry of a valid password for enabling the protected computer program product past the designated test period.