US3055759A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Temperature indicators
Assignee: Individual
•
Filing: 1959-04-13
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Granted: 1962-09-25
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Expires: 1979-04-13
Abstract
No abstract record available.
Inventors
- 👤 John C Busby
- 👤 Retzky Clarence
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 08:36
CPC Classifications
G; G01; G01K; G01K11/00; G01K11/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
104 words
A TEMPERATURE INDICATOR FOR A FROZEN PRODUCT PACKAGE COMPRISING, AN ELONGATED HOLLOW CASING, SAID CASING BEING SHAPED TO FORM A FLUID CHAMBER FOR POSITIONING DEEP IN SAID PACKAGE AND AN INDICATING CHAMBER VIEWABLE EXTERIORLY OF SAID PACKAGE AND HAVING A FLUID-TIGHT SEAL BETWEEN SAID CHAMBERS, A FREEZABLE FLUID IN SAID FLUID CHAMBER, SAID SEAL BREAKING TO ESTABLISH FLUID COMMUNICATION BETWEEN SAID CHAMBERS WHEN SAID FLUID IS FROZEN, A SECOND SEAL IN SAID CASSING BETWEEN SAID CHAMBERS, SAID SECOND SEAL BEING SLOWLY DISSOLVABLE BY SAID FLUID, AND MEANS IN SAID INDICATING CHAMBER CAPABLE OF REACTING WITH SAID FLUID FOR PERMANENTLY INDICATING THAWING OF SAID FLUID.
Claim 2
Dependent Claim
104 words
A TEMPERATURE INDICATOR FOR A FROZEN PRODUCT PACKAGE COMPRISING, AN ELONGATED HOLLOW CASING, SAID CASING BEING SHAPED TO FORM A FLUID CHAMBER FOR POSITIONING DEEP IN SAID PACKAGE AND AN INDICATING CHAMBER VIEWABLE EXTERIORLY OF SAID PACKAGE AND HAVING A FLUID-TIGHT SEAL BETWEEN SAID CHAMBERS, A FREEZABLE FLUID IN SAID FLUID CHAMBER, SAID SEAL BREAKING TO ESTABLISH FLUID COMMUNICATION BETWEEN SAID CHAMBERS WHEN SAID FLUID IS FROZEN, A SECOND SEAL IN SAID CASSING BETWEEN SAID CHAMBERS, SAID SECOND SEAL BEING SLOWLY DISSOLVABLE BY SAID FLUID, AND MEANS IN SAID INDICATING CHAMBER CAPABLE OF REACTING WITH SAID FLUID FOR PERMANENTLY INDICATING THAWING OF SAID FLUID.
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) | 1965-09-24 | 1966-03-26 | 1966-09-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-09-24 | 1970-03-26 | 1970-09-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-09-24 | 1974-03-26 | 1974-09-25 | $7700.00 | Window Closed / Lapsed |