Patent US2683239A successfully refreshed from Google Patents.
US2985697A
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Operability of caa pretreat units for acetylene removal
Assignee: ExxonMobil Technology and Engineering Co
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Filing: 1959-05-01
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Granted: 1961-05-23
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Expires: 1979-05-01
Abstract
No abstract record available.
Inventors
- 👤 Robert P Cahn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 15:23
CPC Classifications
C; C07; C07C; C07C7/00; C07C7/11
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
55 words
IN A CUPROUS AMMONIUM ACETATE PRETREAT PROCESS FOR THE REMOVAL OF ACETYLENES FROM C4 BUTADIENE-RICH FEED STREAMS THAT CONTAIN ACETYLENES, IN EXCESS OF 2500 P.P.M., RECYCLING SUBSTANTIALLY ACETYLENE-FREE TREATED BUTADIENE-BEARING PRODUCT TO THE PROCESS IN AMOUNTS SUFFICIENT TO REDUCE THE CONTENT OF ACETYLENES IN THE TOTAL FEED STREAM TREATED TO BELOW 2500 P.P.M. OF ACETYLENES.
Claim 2
Dependent Claim
55 words
IN A CUPROUS AMMONIUM ACETATE PRETREAT PROCESS FOR THE REMOVAL OF ACETYLENES FROM C4 BUTADIENE-RICH FEED STREAMS THAT CONTAIN ACETYLENES, IN EXCESS OF 2500 P.P.M., RECYCLING SUBSTANTIALLY ACETYLENE-FREE TREATED BUTADIENE-BEARING PRODUCT TO THE PROCESS IN AMOUNTS SUFFICIENT TO REDUCE THE CONTENT OF ACETYLENES IN THE TOTAL FEED STREAM TREATED TO BELOW 2500 P.P.M. OF ACETYLENES.
References Cited (Backward Citations)
US2788378A
Cited
US2870232A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-05-22 | 1964-11-21 | 1965-05-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-05-22 | 1968-11-21 | 1969-05-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-05-22 | 1972-11-21 | 1973-05-23 | $7700.00 | Window Closed / Lapsed |