US2735879A
Expired / Lapsed
US
⏱️ 0.0 years remaining
redcay
Assignee: —
•
Filing: —
•
Granted: 1956-02-21
•
Expires: 1973-02-21
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 15:07
CPC Classifications
C; C07; C07C; C07C5/00; C07C5/02; C07C5/08; C07C2523/00; C07C2523/70; C07C2523/76; C07C2523/84; C07C2523/85; C07C2523/88; C07C2523/882
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
122 words
A PROCESS FOR SELECTIVELY HYDROGENATING ACETYLENIC COMPOUNDS IN A MIXTURE COMPRISING SAID COMPOUNDS, OLEFINS AND HYDROGEN AT LEAST IN AN AMOUNT SUFFICIENT TO HYDROGENATE SAID ACETYLENIC COMPOUNDS TO THE CORRESPONDING ETHYLENIC COMPOUNDS WHICH COMPRISES PASSING SAID MIXTURE IN THE PRESENCE OF ADDED WATER VAPOR, THE TOTAL WATER VAPOR CONTENT THEREOF AFTER ADDITION BEING IN EXCESS OF THE CORRESPONDING TO SATURATION AT A SELECTED PRESSURE WITHIN THE RANGE OF ABOUT ATMOSPHERIC TO ABOUT 1500 POUNDS PER SQUARE INCH GAUGE AND A TEMPERATURE OF ABOUT 125* F. BUT BEING NO LESS THAN ABOUT 1.5 PER CENT NOR MORE THAN ABOUT 11 PER CENT BY VOLUME, OVER A COBALT MOLYBDATE CATALYST AT SAID PRESSURE AND AT A TEMPERATURE OF ABOUT 350* TO ABOUT 600* F.
Claim 2
Dependent Claim
122 words
A PROCESS FOR SELECTIVELY HYDROGENATING ACETYLENIC COMPOUNDS IN A MIXTURE COMPRISING SAID COMPOUNDS, OLEFINS AND HYDROGEN AT LEAST IN AN AMOUNT SUFFICIENT TO HYDROGENATE SAID ACETYLENIC COMPOUNDS TO THE CORRESPONDING ETHYLENIC COMPOUNDS WHICH COMPRISES PASSING SAID MIXTURE IN THE PRESENCE OF ADDED WATER VAPOR, THE TOTAL WATER VAPOR CONTENT THEREOF AFTER ADDITION BEING IN EXCESS OF THE CORRESPONDING TO SATURATION AT A SELECTED PRESSURE WITHIN THE RANGE OF ABOUT ATMOSPHERIC TO ABOUT 1500 POUNDS PER SQUARE INCH GAUGE AND A TEMPERATURE OF ABOUT 125* F. BUT BEING NO LESS THAN ABOUT 1.5 PER CENT NOR MORE THAN ABOUT 11 PER CENT BY VOLUME, OVER A COBALT MOLYBDATE CATALYST AT SAID PRESSURE AND AT A TEMPERATURE OF ABOUT 350* TO ABOUT 600* F.
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) | 1959-02-20 | 1959-08-22 | 1960-02-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-02-20 | 1963-08-22 | 1964-02-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-02-20 | 1967-08-22 | 1968-02-21 | $7700.00 | Window Closed / Lapsed |