US2788282A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermal indicators
Assignee: Individual
•
Filing: 1954-06-11
•
Granted: 1957-04-09
•
Expires: 1974-06-11
Abstract
No abstract record available.
Inventors
- 👤 Jr John Hays Hammond
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:08
CPC Classifications
G; G01; G01N; G01N31/00; G01N31/22; G01N31/229
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
148 words
AN INDICATOR FOR FROZEN FOOD, COMPRISING AN ELONGATED TRANSPARENT CONTAINER TO BE EMBODIED IN THE FOOD PACKAGE IN A VISIBLE POSITION, A PISTON SLIDABLE IN SAID CONTAINER, A SPRING IN SAID CONTAINER BIASED TO URGE SAID PISTON TO A FULLY ADVANCED POSITION, AND A MASS OF FROZEN MATERIAL HAVING A MELTING POINT NOT GREATER THAN THAT OF THE FROZEN FOOD HELD IN SAID CONTAINER AND DUE TO ITS FROZEN STATE HOLDING SAID PISTON IN FULL RETRACTED POSITION WITH SAID SPRING COMPRESSED, AND A NON-TRANSPARENT COVER CONCEALING THE PISTON FROM VIEW THROUGH SAID TRANSPARENT CONTAINER WHEN IN SAID FULLY RETRACTED POSITION, SAID SPRING BEING ADAPTED TO ADVANCE SAID PISTON INTO VIEW BEYOUND SAID NON-TRANSPARENT COVER AND TO ADVANCE SLOWLY TO FULLY ADVANCED POSITION WHEN SAID MA TERIAL IS MELTED, WHEREBY THE DISPLACEMENT OF THE PISTON IS AN INDICATION OF THE TIME OF EXPOSURE OF THE FOOD TO MELTING TEMPERATURE.
Claim 2
Dependent Claim
148 words
AN INDICATOR FOR FROZEN FOOD, COMPRISING AN ELONGATED TRANSPARENT CONTAINER TO BE EMBODIED IN THE FOOD PACKAGE IN A VISIBLE POSITION, A PISTON SLIDABLE IN SAID CONTAINER, A SPRING IN SAID CONTAINER BIASED TO URGE SAID PISTON TO A FULLY ADVANCED POSITION, AND A MASS OF FROZEN MATERIAL HAVING A MELTING POINT NOT GREATER THAN THAT OF THE FROZEN FOOD HELD IN SAID CONTAINER AND DUE TO ITS FROZEN STATE HOLDING SAID PISTON IN FULL RETRACTED POSITION WITH SAID SPRING COMPRESSED, AND A NON-TRANSPARENT COVER CONCEALING THE PISTON FROM VIEW THROUGH SAID TRANSPARENT CONTAINER WHEN IN SAID FULLY RETRACTED POSITION, SAID SPRING BEING ADAPTED TO ADVANCE SAID PISTON INTO VIEW BEYOUND SAID NON-TRANSPARENT COVER AND TO ADVANCE SLOWLY TO FULLY ADVANCED POSITION WHEN SAID MA TERIAL IS MELTED, WHEREBY THE DISPLACEMENT OF THE PISTON IS AN INDICATION OF THE TIME OF EXPOSURE OF THE FOOD TO MELTING TEMPERATURE.
References Cited (Backward Citations)
US2460215A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-04-08 | 1960-10-08 | 1961-04-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-04-08 | 1964-10-08 | 1965-04-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-04-08 | 1968-10-08 | 1969-04-09 | $7700.00 | Window Closed / Lapsed |