US2738429A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Indicator for high energy radiation sterilizing processes
Assignee: Individual
•
Filing: 1952-08-02
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Granted: 1956-03-13
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Expires: 1972-08-02
Abstract
No abstract record available.
Inventors
- 👤 Samuel A Goldblith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:44
CPC Classifications
A; A61; A61L; A61L2/00; A61L2/26; A61L2/28; A23; A23B; A23B11/00; A23B11/10; A23B11/16; A23B2/00; A23B2/50; A23B2/503; G; G01; G01N; G01N31/00; G01N31/22; G01N31/226
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
120 words
A PACKAGE ADAPTED TO BE PASSED THROUGH A FIELD OF HIGH ENERGY RADIATION AND CONTAINING MATERIAL TO BE STERILIZED BY SAID RADIATION, AND A MARKING ON THE OUTSIDE OF SAID PACKAGE MADE OF A RADIATION-INDICATOR MARKING INK COMPRISING AN INTIMATE MIXTURE OF A TETRAZOLIUM SALT, AN INK VEHICLE, A THICKENER, A BENZOATE, AND A HYDROPHILIC MATERIAL RETAINING WATER, WHICH UPON SUBJECTION TO HIGH ENERGY RADIATION IN EXCESS OF 100,000 ELECTRON VOLTS IN AMOUNTS ABOVE 10,000 REP IS CONVERTED TO A DISTINCTLY COLORED PRODUCT BY THE FORMATION OF A FORMAZAN-TYPE DYE BY THE ACTION OF THE HIGH ENERGY IONIZATION PRODUCTS OF WATER, EACH NUCLEUS OF SAID DYE RESULTING FROM THE REACTION OF ONE TETRAZOLIUM NUCLEUS WITH ONE DECOMPOSED MOLECULE OF WATER.
Claim 2
Dependent Claim
120 words
A PACKAGE ADAPTED TO BE PASSED THROUGH A FIELD OF HIGH ENERGY RADIATION AND CONTAINING MATERIAL TO BE STERILIZED BY SAID RADIATION, AND A MARKING ON THE OUTSIDE OF SAID PACKAGE MADE OF A RADIATION-INDICATOR MARKING INK COMPRISING AN INTIMATE MIXTURE OF A TETRAZOLIUM SALT, AN INK VEHICLE, A THICKENER, A BENZOATE, AND A HYDROPHILIC MATERIAL RETAINING WATER, WHICH UPON SUBJECTION TO HIGH ENERGY RADIATION IN EXCESS OF 100,000 ELECTRON VOLTS IN AMOUNTS ABOVE 10,000 REP IS CONVERTED TO A DISTINCTLY COLORED PRODUCT BY THE FORMATION OF A FORMAZAN-TYPE DYE BY THE ACTION OF THE HIGH ENERGY IONIZATION PRODUCTS OF WATER, EACH NUCLEUS OF SAID DYE RESULTING FROM THE REACTION OF ONE TETRAZOLIUM NUCLEUS WITH ONE DECOMPOSED MOLECULE OF WATER.
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) | 1959-03-13 | 1959-09-12 | 1960-03-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-03-13 | 1963-09-12 | 1964-03-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-03-13 | 1967-09-12 | 1968-03-13 | $7700.00 | Window Closed / Lapsed |