Seafood spoilage indicating system

• US 2,626,855 A
• Filed: 06/26/1950
• Issued: 01/27/1953
• Est. Priority Date: 06/26/1950
• Status: Expired due to Term

• Current Assignee: Wilfred C. Hand
• Original Assignee: Wilfred C. Hand
• Inventors: Hand, Wilfred C.
• Application Number:
  US03/170,367
• Time in Patent Office: 946 Days
• US Class Current: 436/20
• CPC Class Codes: A23B 4/00 General methods for preserving meat, sausages, fish or fish products
• CPC Class Codes: A23B 4/14 Preserving with chemicals not covered by groups A23B4/02 or A23B4/12
• CPC Class Codes: G01N 31/22 using chemical indicators G01N31/02 takes precedence
• CPC Class Codes: Y10S 428/913 Material designed to be responsive to temperature, light, moisture

Claims

4. A METHOD OF INDICATING SPOILAGE IN SOLID FOODSTUFFS WHICH CONSISTS OF INSERTING AN ELONGATED SHARP POINTED INDICATOR INTO THE INTERIOR OF THE FOODSTUFFS, WITHDRAWING THE SAME AND THEN OBSERVING ANY NOTICEABLE COLOR CHANGE IN THE INDICATOR WITHOUT MARRING OF SUCH FOODSTUFFS, SAID INDICATOR BEING A COMPLEX ORGANIC COMPOUND GIVING A BRILLIANT COLOR CHANGE IN THE PRESENCE OF TOXIC MATERIALS AND BEING ACTIVE AT A PH RANGE