Patent US3258312A successfully refreshed from Google Patents.
US3258312A
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Ethylene oxide monitoring method and sheet material, and packages bearing same
Assignee: 3M Co
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Filing: 1960-11-17
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Granted: 1966-06-28
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Expires: 1980-11-17
Abstract
No abstract record available.
Inventors
- 👤 Melvin M Olson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 19:54
CPC Classifications
A; A61; A61L; A61L2/00; A61L2/16; A61L2/20; A61L2/206; G; G01; G01N; G01N31/00; G01N31/22; G01N31/226; Y; Y10; Y10T; Y10T436/00; Y10T436/14; Y10T436/142222
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
86 words
THE METHOD OF DETECTING THE PRESENCE OF SUBSTANTIAL AMOUNTS OF AMBIENT ETHYLENE OXIDE IN A GIVEN ENVIRONMENT WHICH COMPRISES THE STEPS OF EXPOSING TO SAID ENVIRONMENT IN THE PRESENCE OF MOISTURE A DETECTING MEANS COMPRISING WATER-SOLUBLE SALT THE SATURATED AQUEOUS SOLUTION OF WHICH HAS A FIXED PH, SAID SALT IN AQUEOUS SOLUTION BEING REACTIVE WITH ETHYLENE OXIDE WITH AN INCREASE IN HYDROXYL IONS, AND SAID DETECTING MEANS INCLUDING MEANS FOR EFFECTING A VISIBLE CHANGE IN SAID DETECTING MEANS UPON INCREASE IN THE NUMBER OF HYDROXYL IONS.
Claim 2
Independent Claim
86 words
THE METHOD OF DETECTING THE PRESENCE OF SUBSTANTIAL AMOUNTS OF AMBIENT ETHYLENE OXIDE IN A GIVEN ENVIRONMENT WHICH COMPRISES THE STEPS OF EXPOSING TO SAID ENVIRONMENT IN THE PRESENCE OF MOISTURE A DETECTING MEANS COMPRISING WATER-SOLUBLE SALT THE SATURATED AQUEOUS SOLUTION OF WHICH HAS A FIXED PH, SAID SALT IN AQUEOUS SOLUTION BEING REACTIVE WITH ETHYLENE OXIDE WITH AN INCREASE IN HYDROXYL IONS, AND SAID DETECTING MEANS INCLUDING MEANS FOR EFFECTING A VISIBLE CHANGE IN SAID DETECTING MEANS UPON INCREASE IN THE NUMBER OF HYDROXYL IONS.
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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) | 1969-06-27 | 1969-12-27 | 1970-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-06-27 | 1973-12-27 | 1974-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-06-27 | 1977-12-27 | 1978-06-28 | $7700.00 | Window Closed / Lapsed |