US2671028A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and means for indicating product deterioration
Assignee: Individual
•
Filing: 1949-10-17
•
Granted: 1954-03-02
•
Expires: 1969-10-17
Abstract
No abstract record available.
Inventors
- 👤 James D A Clark
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 12:29
CPC Classifications
G; G01; G01N; G01N31/00; G01N31/22; G01N31/229; Y; Y10; Y10S; Y10S435/00; Y10S435/805
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
59 words
THE METHOD OF INDICATING THAT A PRODUCT HAS BEEN UNDER TIME AND TEMPERATURE CONDITIONS FAVORING APPRECIABLE DETERIORATION, COMPRISING PLACING ADJACENT TO THE PRODUCT AN ENZYME SYSTEM AND A VISUAL INDICATOR RESPONSIVE TO ENZYME ACTION, WHICH INDICATOR ASSUMES A CHANGE IN APPEARANCE AFTER THE ENSEMBLE HAS BEEN SUBJECTED TO TIME AND TEMPERATURE CONDITIONS PRODUCING APPRECIABLE DETERIORATION OF THE PACKAGED PRODUCT.
Claim 2
Independent Claim
59 words
THE METHOD OF INDICATING THAT A PRODUCT HAS BEEN UNDER TIME AND TEMPERATURE CONDITIONS FAVORING APPRECIABLE DETERIORATION, COMPRISING PLACING ADJACENT TO THE PRODUCT AN ENZYME SYSTEM AND A VISUAL INDICATOR RESPONSIVE TO ENZYME ACTION, WHICH INDICATOR ASSUMES A CHANGE IN APPEARANCE AFTER THE ENSEMBLE HAS BEEN SUBJECTED TO TIME AND TEMPERATURE CONDITIONS PRODUCING APPRECIABLE DETERIORATION OF THE PACKAGED PRODUCT.
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) | 1957-03-01 | 1957-08-31 | 1958-03-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-03-01 | 1961-08-31 | 1962-03-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-03-01 | 1965-08-31 | 1966-03-02 | $7700.00 | Window Closed / Lapsed |