US2880072A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of determining carbon dioxide in gases
Assignee: Individual
•
Filing: 1956-08-02
•
Granted: 1959-03-31
•
Expires: 1976-08-02
Abstract
No abstract record available.
Inventors
- 👤 Grosskopf Karl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 02:05
CPC Classifications
G; G01; G01N; G01N31/00; G01N31/22; Y; Y10; Y10S; Y10S436/00; Y10S436/904; Y10T; Y10T436/00; Y10T436/20; Y10T436/204998
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
44 words
A METHOD FOR DETERMINING THE CONTENT OF CARBON DIOXIDE IN THE AIR AND IN OTHER GASES COMPRISING CONTACTING GAS WITH A SOLID CARRIER IMPREGNATED WITH A REAGENT COMPOSED OF HYDRAZINE AND A REDUCTION-OXIDATION COLORIMETRIC INDICATOR, AND THEN DETERMINING THE COLOR CHANGES IN THE CARRIER.
Claim 2
Independent Claim
44 words
A METHOD FOR DETERMINING THE CONTENT OF CARBON DIOXIDE IN THE AIR AND IN OTHER GASES COMPRISING CONTACTING GAS WITH A SOLID CARRIER IMPREGNATED WITH A REAGENT COMPOSED OF HYDRAZINE AND A REDUCTION-OXIDATION COLORIMETRIC INDICATOR, AND THEN DETERMINING THE COLOR CHANGES IN THE CARRIER.
References Cited (Backward Citations)
US2487077A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-03-30 | 1962-09-29 | 1963-03-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-03-30 | 1966-09-29 | 1967-03-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-03-30 | 1970-09-29 | 1971-03-31 | $7700.00 | Window Closed / Lapsed |