Patent US2973384A successfully refreshed from Google Patents.
US2973384A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for synthesizing ethylene
Assignee: Chiyoda Corp
•
Filing: 1957-07-29
•
Granted: 1961-02-28
•
Expires: 1977-07-29
Abstract
No abstract record available.
Inventors
- 👤 Hayashi Tateki
- 👤 Tsutsumi Shigeru
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 19:27
CPC Classifications
C; C07; C07C; C07C1/00; C07C1/02; C07C1/04; C07C1/0425; C07C1/043; C07C1/0435; C07C2521/00; C07C2521/02; C07C2521/04; C07C2521/06; C07C2521/08; C07C2521/12; C07C2523/00; C07C2523/16; C07C2523/24; C07C2523/26; C07C2523/70; C07C2523/72; C07C2523/74; C07C2523/75; C07C2523/755; Y; Y10; Y10S; Y10S585/00; Y10S585/929; Y10S585/943
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
64 words
A PROCESS FOR CATALYTICALLY SYNTHESIZING ETHYLENE WHICH CONSISTS OF CONTACTING A MIXTURE CONSISTING ESSENTIALLY OF CARBON MONOXIDE AND HYDROGEN AT A TEMPERATURE FROM 200* TO 450*C. AND AT A PRESSURE FROM ABOUT 1 TO ABOUT 40 ATMOSPHERES WITH A CATALYST WHICH CONSISTS ESSENTIALLY OF A MEMBER SELECTED FROM THE GROUP CONSISTING OF ALUMINA GEL, SILICA GEL AND MIXTURES OF ALUMINA GEL AND SILICA GEL.
Claim 2
Dependent Claim
64 words
A PROCESS FOR CATALYTICALLY SYNTHESIZING ETHYLENE WHICH CONSISTS OF CONTACTING A MIXTURE CONSISTING ESSENTIALLY OF CARBON MONOXIDE AND HYDROGEN AT A TEMPERATURE FROM 200* TO 450*C. AND AT A PRESSURE FROM ABOUT 1 TO ABOUT 40 ATMOSPHERES WITH A CATALYST WHICH CONSISTS ESSENTIALLY OF A MEMBER SELECTED FROM THE GROUP CONSISTING OF ALUMINA GEL, SILICA GEL AND MIXTURES OF ALUMINA GEL AND SILICA GEL.
Claim 3
Dependent Claim
100 words
IN A PROCESS FOR SYNTHESIZING ETHYLENE CATALYTICALLY, THE IMPROVEMENT WHICH CONSISTS ESSENTIALLY OF CONTACTING AT A TEMPERATURE OF ABOUT 250*C. AND A PRESSURE FROM ABOUT 1 TO ABOUT 40 ATMOSPHERES A MIXTURE CONSISTING ESSENTIALLY OF CARBON MONOXIDE AND HYDROGEN WITH A CATALYST WHICH CONSISTS OF (A) A MEMBER SELECTED FROM THE GROUP CONSISTING OF ALUMINA GEL, SILICA GEL AND MIXTURES OF ALUMINA GEL AND SILICA GEL, AND (B) A MEMBER SELECTED FROM THE GROUP CONSISTING OF A COMPOUND OF A MEMBER SELECTED FROM THE GROUP CONSISTING OF CHROMIUM, COPPER, NICKEL AND COBALT, WHEREBY ETHYLENE YIELDS OF ABOUT 90% ARE OBTAINED.
Claim 4
Dependent Claim
100 words
IN A PROCESS FOR SYNTHESIZING ETHYLENE CATALYTICALLY, THE IMPROVEMENT WHICH CONSISTS ESSENTIALLY OF CONTACTING AT A TEMPERATURE OF ABOUT 250*C. AND A PRESSURE FROM ABOUT 1 TO ABOUT 40 ATMOSPHERES A MIXTURE CONSISTING ESSENTIALLY OF CARBON MONOXIDE AND HYDROGEN WITH A CATALYST WHICH CONSISTS OF (A) A MEMBER SELECTED FROM THE GROUP CONSISTING OF ALUMINA GEL, SILICA GEL AND MIXTURES OF ALUMINA GEL AND SILICA GEL, AND (B) A MEMBER SELECTED FROM THE GROUP CONSISTING OF A COMPOUND OF A MEMBER SELECTED FROM THE GROUP CONSISTING OF CHROMIUM, COPPER, NICKEL AND COBALT, WHEREBY ETHYLENE YIELDS OF ABOUT 90% ARE OBTAINED.
References Cited (Backward Citations)
US1911746A
Cited
US2735862A
Cited
US2276921A
Cited
US2471228A
Cited
US2637739A
Cited
US2685596A
Cited
US2662090A
Cited
US2768961A
Cited
US2791583A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-02-28 | 1964-08-29 | 1965-02-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-02-28 | 1968-08-29 | 1969-02-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-02-28 | 1972-08-29 | 1973-02-28 | $7700.00 | Window Closed / Lapsed |