Patent US2852394A successfully refreshed from Google Patents.
US2852394A
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Frozen food thaw indicator
Assignee: Individual
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Filing: 1954-11-23
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Granted: 1958-09-16
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Expires: 1974-11-23
Abstract
No abstract record available.
Inventors
- 👤 Fahringer Jerry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:37
CPC Classifications
A; A23; A23B; A23B7/00; A23B7/04; A23B7/0441; G; G01; G01N; G01N31/00; G01N31/22; G01N31/229
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
103 words
A THAW INDICATOR FOR USE ON PACKAGES CONTAINING FROZEN FOODS COMPRISING, A PAIR OF INDIVIDUAL ADSORBENT CORDS TWISTED TOGETHER INTO A UNIT LENGTH OF CORD, THE SAID CORDS EACH HAVING FROZEN CRYSTALS OF A LIQUID BATH THEREON WHICH HAVE A MELTING POINT EQUIVALENT TO THE FREEZING POINT OF THE FROZEN FOOD, EACH OF SAID CORDS AND ITS ASSOCIATED CRYSTALS CONTAINING A VEGETABLE DYE WHICH IS OF A DIFFERENT COLOR THAN THAT OF THE OTHER CORD AND ITS SAID ASSOCIATED CRYSTALS, THE DIFFERENT COLOR DYES OF SAID CORDS AND CRYSTALS BEING ADAPTED TO MERGE AND FORM A NEW COLOR WHEN THE CRYSTALS THEREON MELT.
Claim 2
Dependent Claim
103 words
A THAW INDICATOR FOR USE ON PACKAGES CONTAINING FROZEN FOODS COMPRISING, A PAIR OF INDIVIDUAL ADSORBENT CORDS TWISTED TOGETHER INTO A UNIT LENGTH OF CORD, THE SAID CORDS EACH HAVING FROZEN CRYSTALS OF A LIQUID BATH THEREON WHICH HAVE A MELTING POINT EQUIVALENT TO THE FREEZING POINT OF THE FROZEN FOOD, EACH OF SAID CORDS AND ITS ASSOCIATED CRYSTALS CONTAINING A VEGETABLE DYE WHICH IS OF A DIFFERENT COLOR THAN THAT OF THE OTHER CORD AND ITS SAID ASSOCIATED CRYSTALS, THE DIFFERENT COLOR DYES OF SAID CORDS AND CRYSTALS BEING ADAPTED TO MERGE AND FORM A NEW COLOR WHEN THE CRYSTALS THEREON MELT.
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) | 1961-09-15 | 1962-03-17 | 1962-09-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-09-15 | 1966-03-17 | 1966-09-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-09-15 | 1970-03-17 | 1970-09-16 | $7700.00 | Window Closed / Lapsed |