US3751382A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Enzymatic indicator and method of making it
Assignee: Food Control AB
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Filing: 1971-12-17
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Granted: 1973-08-07
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Expires: 1991-12-17
Abstract
Abstract AN ENZYMATIC INDICATOR AND A METHOD OF MAKING THE INDICATOR WHICH COMPRISES THE ENZYME UREAS, THE SUBSTRATE UREA, A PH-RESPONSIVE INDICATING SUBSTANCE, OPTIONALLY A BUFFER, AND, FOR CHANGING AND ADJUSTING THE TIME-TEMPERATURE-RESPONSIVE FUNCTION OF THE INDICATOR AT LOW TEMPERATURES, GLYCEROL.
Inventors
- 👤 S Ljungberg
- 👤 K Alm
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 18:37
CPC Classifications
B; B41; B41M; B41M1/00; B41M1/22; G; G01; G01N; G01N33/00; G01N33/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-08-06 | 1977-02-05 | 1977-08-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-06 | 1981-02-05 | 1981-08-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-06 | 1985-02-05 | 1985-08-07 | $7700.00 | Window Closed / Lapsed |