US3068073A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Determination of carbon dioxide
Assignee: MSA Safety Inc
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Filing: 1960-04-22
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Granted: 1962-12-11
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Expires: 1980-04-22
Abstract
No abstract record available.
Inventors
- 👤 Evelyn C Stanford
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:18
CPC Classifications
G; G01; G01N; G01N31/00; G01N31/22; Y; Y10; Y10T; Y10T436/00; Y10T436/20; Y10T436/204998
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
65 words
A METHOD OF DETERMINING CARBON DIOXIDE IN A GAS WHICH COMPRISES THE STEPS OF PASSING THE GAS TO BE TESTED THROUGH A SOLID REAGENT COMPRISING ACTIVATED ALUMINA CARRYING A MATERIAL SELECTED FROM THE GROUP CONSISTING OF THYMOL BLUE AND THYMOL BLUE TOGETHER WITH A BASE, SAID REAGENT BEING CONFINED WITHIN A TRANSPARENT CONTAINER AND SAID REAGENT BEING CHANGED IN COLOR BY CONTACT WITH CARBON DIOXIDE.
Claim 2
Independent Claim
65 words
A METHOD OF DETERMINING CARBON DIOXIDE IN A GAS WHICH COMPRISES THE STEPS OF PASSING THE GAS TO BE TESTED THROUGH A SOLID REAGENT COMPRISING ACTIVATED ALUMINA CARRYING A MATERIAL SELECTED FROM THE GROUP CONSISTING OF THYMOL BLUE AND THYMOL BLUE TOGETHER WITH A BASE, SAID REAGENT BEING CONFINED WITHIN A TRANSPARENT CONTAINER AND SAID REAGENT BEING CHANGED IN COLOR BY CONTACT WITH CARBON DIOXIDE.
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) | 1965-12-10 | 1966-06-11 | 1966-12-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-12-10 | 1970-06-11 | 1970-12-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-12-10 | 1974-06-11 | 1974-12-11 | $7700.00 | Window Closed / Lapsed |