US2553369A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Frozen food thawing indicator
Assignee: EMIL L COHEN
•
Filing: 1948-11-16
•
Granted: 1951-05-15
•
Expires: 1968-11-16
Abstract
No abstract record available.
Inventors
- 👤 Hoffman Sigmund
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 06:08
CPC Classifications
G; G01; G01N; G01N31/00; G01N31/22; G01N31/229; Y; Y10; Y10S; Y10S252/00; Y10S252/962
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
39 words
A FROZEN FOOD THAWING INDICATOR COMPRISING A HERMETICALLY SEALED TRANSPARENT ENCLOSURE CONTAINING A CARRIER BEARING, IN COMBINATION, HYDRATED POTASSIUM TRI-IODIDE AND SOLUBLE STARCH AND A DIASTASE APPLIED TO THE CARRIER AT SUB-FREEZING TEMPERATURES AND MAINTAINED THEREAT PRIOR TO USE.
Claim 2
Dependent Claim
39 words
A FROZEN FOOD THAWING INDICATOR COMPRISING A HERMETICALLY SEALED TRANSPARENT ENCLOSURE CONTAINING A CARRIER BEARING, IN COMBINATION, HYDRATED POTASSIUM TRI-IODIDE AND SOLUBLE STARCH AND A DIASTASE APPLIED TO THE CARRIER AT SUB-FREEZING TEMPERATURES AND MAINTAINED THEREAT PRIOR TO USE.
References Cited (Backward Citations)
US2485566A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-05-14 | 1954-11-13 | 1955-05-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-05-14 | 1958-11-13 | 1959-05-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-05-14 | 1962-11-13 | 1963-05-15 | $7700.00 | Window Closed / Lapsed |