U.S. patents available from 1976 to present.
U.S. patent applications available from 2005 to present.

Method for controlling the locking and unlocking of system resources in a shared resource distributed computing environment

Patent 5734909 Issued on March 31, 1998. Estimated Expiration Date: Icon_subject September 1, 2015. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.

Patent References

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System for file and record locking between nodes in a distributed data processing environment maintaining one copy of each file lock
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File lock management in a distributed data processing system
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Data structures and algorithms for managing lock states of addressable element ranges
Patent #: 5285528
Issued on: 02/08/1994
Inventor: Hart

Method and apparatus for releasing and obtaining shared and exclusive locks
Patent #: 5287521
Issued on: 02/15/1994
Inventor: Nitta, et al.

User selectable lock regions
Patent #: 5339389
Issued on: 08/16/1994
Inventor: Bates, et al.

Method and apparatus for distributed locking of shared data, employing a central coupling facility
Patent #: 5339427
Issued on: 08/16/1994
Inventor: Elko, et al.

Data processing system and method for providing notification in a central processor of state changes for shared data structure on external storage
Patent #: 5390328
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File lock management in a distributed data processing system Patent #: 5537645
Issued on: 07/16/1996
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Inventor

Application

No. 522689 filed on 09/01/1995

US Classes:

710/200, ACCESS LOCKING707/8, Concurrency (e.g., lock management in shared database)709/229, Network resources access controlling711/152Memory access blocking

Examiners

Primary: Harvey, Jack B.
Assistant: Etienne, Ario

Attorney, Agent or Firm

International Class

G06F 012/14

Abstract

A method of and system for optimizing process utilization in a shared resource environment that avoids holding system processes while requests are queued or waiting for system resources. Information about a waiting request is retained in control structures; then the same process that frees a resource is utilized to respond to queued requests for that resource. The effect is to minimize the retention and/or allocation of processes and their associated system resource requirements. The same method is applied to the synchronization of interprocess communications.

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