US2648598A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for determination of ethylene in gases
Assignee: United States Department of Agriculture
•
Filing: 1950-06-27
•
Granted: 1953-08-11
•
Expires: 1970-06-27
Abstract
No abstract record available.
Inventors
- 👤 Stitt Fred
- 👤 Tomimatsu Yoshio
- 👤 Arnt H Tjensvold
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 23:15
CPC Classifications
G; G01; G01N; G01N31/00; G01N31/22; Y; Y10; Y10T; Y10T436/00; Y10T436/21; Y10T436/214; Y10T436/216
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
105 words
THE PROCESS OF DETERMINING THE CONCENTRATION OF ETHYLENE IN A GAS WHICH COMPRISES PASSING THE GAS AT A TEMPERATURE FROM ABOUT 285* C. TO ABOUT 300* C. OVER RED MERCURIC OXIDE FOR A CONTACT TIME OF 2 TO 25 SECONDS WHEREBY A REACTION OCCURS AND MERCURY IS RELEASED INTO THE GAS IN PROPORTIONS TO THE CONCENTRATION OF ETHYLENE, PASSING THE GASEOUS PRODUCTS OF THE REACTION LONGITUDINALLY ALONG THE SURFACE OF AN ELONGATED STRIP COATED WITH ELEMENTAL RED SELENIUM MAINTAINED AT A TEMPERATURE FROM ABOUT 120* C. TO ABOUT 200* C. AND ASCERTAINING THE CONCENTRATION OF ETHYLENE BY THE LENGTH OF BLACKENING ALONG THE SELENIUM STRIP.
Claim 2
Dependent Claim
105 words
THE PROCESS OF DETERMINING THE CONCENTRATION OF ETHYLENE IN A GAS WHICH COMPRISES PASSING THE GAS AT A TEMPERATURE FROM ABOUT 285* C. TO ABOUT 300* C. OVER RED MERCURIC OXIDE FOR A CONTACT TIME OF 2 TO 25 SECONDS WHEREBY A REACTION OCCURS AND MERCURY IS RELEASED INTO THE GAS IN PROPORTIONS TO THE CONCENTRATION OF ETHYLENE, PASSING THE GASEOUS PRODUCTS OF THE REACTION LONGITUDINALLY ALONG THE SURFACE OF AN ELONGATED STRIP COATED WITH ELEMENTAL RED SELENIUM MAINTAINED AT A TEMPERATURE FROM ABOUT 120* C. TO ABOUT 200* C. AND ASCERTAINING THE CONCENTRATION OF ETHYLENE BY THE LENGTH OF BLACKENING ALONG THE SELENIUM STRIP.
References Cited (Backward Citations)
US1512893A
Cited
US1711742A
Cited
US1891429A
Cited
US1977002A
Cited
US2232622A
Cited
US2345090A
Cited
US2567251A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-08-10 | 1957-02-09 | 1957-08-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-08-10 | 1961-02-09 | 1961-08-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-08-10 | 1965-02-09 | 1965-08-11 | $7700.00 | Window Closed / Lapsed |