Inventory management system using RFID

• US 7,680,691 B2
• Filed: 04/29/2004
• Issued: 03/16/2010
• Est. Priority Date: 04/29/2004
• Status: Expired due to Fees

• Current Assignee: SC Johnson & Son Incorporated
• Original Assignee: SC Johnson & Son Incorporated
• Inventors: Kimball, James F., Leonard, Stephen B.
• Primary Examiner(s): Zeender; F.
• Assistant Examiner(s): Champagne; Luna
• Application Number:
  US10/834,814
• Publication Number:
  US 20050258961A1
• Time in Patent Office: 2,147 Days
• Field of Search: None
• US Class Current: 705/22
• CPC Class Codes: F25D 2700/08 Sensors using Radio Frequency Identification [RFID]
• CPC Class Codes: G06Q 10/087 Inventory or stock management, e.g. order filling, procurement or balancing against orders
• CPC Class Codes: G06Q 20/203 Inventory monitoring

Abstract

An inventory management system is provided that includes an RFID interrogator and corresponding RFID tags that are placed on items to be monitored. The tags can be used to monitor the storage time of food items stored in a refrigerator or pantry, the time in use of replaceable items such as toilet bowl cleaners, or the nature of laundry items being washed. The interrogator can be coupled to a display providing various reports on the status of such items. Also disclosed are devices for dispensing such RFID tags.

Claims

1. management system for monitoring selected perishable food products, the system comprising:

a container suitable to sequentially hold the selected perishable food products;

a radio frequency identification tag linked to the container, wherein the identification tag is passive in the absence of interrogation, and upon interrogation can supply tag identification information without also supplying information about a food product characteristic;

an interrogator suitable to interrogate the radio frequency identification tag, the interrogator comprising a processor that can execute a stored program to;

i. apply an initial interrogation signal to the identification tag as one begins to monitor the container;

ii. receive an initial response signal from the identification tag in response to the initial interrogation signal, wherein the initial response signal has tag identification information;

iii. store the tag identification information along with both an indication of an initial monitoring time for the container with an indication of a characteristic of a first food product stored therein;

iv. apply a subsequent interrogation signal to the identification tag, wherein the subsequent interrogation signal occurs after the initial interrogation signal;

v. receive a subsequent response signal from the identification tag in response to the subsequent interrogation signal, wherein the subsequent response signal includes the tag identification; and

vi. determine an elapsed time between the initial monitoring time and the time of the subsequent response signal;

a user interface whereby a user can enter into the processor, without storing additional data on the tag, a characteristic of the first food product when that first food product is about to be monitored, and whereby a user can thereafter activate an instruction to clear the initial monitoring time, elapsed time, and food characteristic information in the processor with respect to that first product in order to permit re-use of the container with a second selected food product; and

wherein the interrogator further comprises a display configured to display the characteristic of the first food product along with the time that the first food product has been monitored.

2. The management system as recited in claim 1, wherein the system is for use with a food storage cabinet selected from the group consisting of refrigerators, pantries and other cabinets.

3. The management system as recited in claim 2, wherein the interrogator is configured to be mounted onto a surface of the cabinet.

4. The management system as recited in claim 3, wherein the surface is a door.

5. The management system as recited in claim 1, wherein the indication of a characteristic of the first food product comprises projected expiration information for the food product.

6. The management system as recited in claim 1, wherein the interrogator comprises an antenna mounted on a door and extending inward therefrom, and a display facing outwardly from the door.