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US2626855A
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Seafood spoilage indicating system
Assignee: Individual
•
Filing: 1950-06-26
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Granted: 1953-01-27
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Expires: 1970-06-26
Abstract
No abstract record available.
Inventors
- 👤 Wilfred C Hand
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 21:53
CPC Classifications
G; G01; G01N; G01N31/00; G01N31/22; A; A23; A23B; A23B4/00; A23B4/14; Y; Y10; Y10S; Y10S428/00; Y10S428/913
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
66 words
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
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-01-27 | 1956-07-28 | 1957-01-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-01-27 | 1960-07-28 | 1961-01-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-01-27 | 1964-07-28 | 1965-01-27 | $7700.00 | Window Closed / Lapsed |