US2716065A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Telltale for frozen food packages
Assignee: Aseptic Thermo Indicator Co
•
Filing: 1951-06-04
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Granted: 1955-08-23
•
Expires: 1971-06-04
Abstract
No abstract record available.
Inventors
- 👤 John S Beckett
- 👤 William J Marenus
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 03:58
CPC Classifications
A; A23; A23B; A23B4/00; A23B4/06; A23B4/08; B; B65; B65D; B65D79/00; B65D79/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
73 words
A TELLTALE DEVICE FOR A REFRIGERATED PACKAGE COMPRISING A SEMI-SOLID IONIC DIFFUSION MASS CONTAINING A PH INDICATOR SUBSTANCE AND WATER; AND A RESERVIOR HAVING WATER-DISPERSED IONS AVAILABLE AT A SURFACE ARRANGED IN COMMUNICATION WITH SAID DIFFUSION MASS, SAID DISPERSED IONS BEING SELECTED AS TO PH TO BE EFFECTIVE TO CHANGE THE COLOR OF SAID PH INDICATOR SUBSTANCE UPON CONTACT THEREWITH WHEN SAID IONS FROM SAID RESERVIOR DIFFUSE BY IONIC MIGRATION INTO SAID MASS.
Claim 2
Dependent Claim
73 words
A TELLTALE DEVICE FOR A REFRIGERATED PACKAGE COMPRISING A SEMI-SOLID IONIC DIFFUSION MASS CONTAINING A PH INDICATOR SUBSTANCE AND WATER; AND A RESERVIOR HAVING WATER-DISPERSED IONS AVAILABLE AT A SURFACE ARRANGED IN COMMUNICATION WITH SAID DIFFUSION MASS, SAID DISPERSED IONS BEING SELECTED AS TO PH TO BE EFFECTIVE TO CHANGE THE COLOR OF SAID PH INDICATOR SUBSTANCE UPON CONTACT THEREWITH WHEN SAID IONS FROM SAID RESERVIOR DIFFUSE BY IONIC MIGRATION INTO SAID MASS.
References Cited (Backward Citations)
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Cited
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Cited
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Cited
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Cited
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Cited
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-08-22 | 1959-02-21 | 1959-08-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-08-22 | 1963-02-21 | 1963-08-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-08-22 | 1967-02-21 | 1967-08-23 | $7700.00 | Window Closed / Lapsed |