US2870232A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Acetylene removal from diolefin streams
Assignee: ExxonMobil Technology and Engineering Co
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Filing: 1955-12-14
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Granted: 1959-01-20
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Expires: 1975-12-14
Abstract
No abstract record available.
Inventors
- 👤 Wilson Samuel Winfield
- 👤 Bodnar Stephen John
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 03:47
CPC Classifications
C; C07; C07C; C07C7/00; C07C7/11
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
72 words
IN A PREWASHING OPERATION WHEREIN ACETYLENIC COMPOUNDS ARE REMOVED FROM A DIOLEFIN-RICH STREAM BY EXTRACTION OF SAID STREAMS IN AN EXTRACTION ZONE WITH AN AQUEOUS AMMONIACAL COPPER SALT SOLUTION TO FORM AN EXTRACT CONTAINING SAID ACETYLENIC COMPOUNDS AND A MINOR AMOUNT OF SAID DIOLEFINS, AND WHERIN SAID EXTRACT IS STRIPPED IN A STRIPPING ZONE TO RECOVER ACETYLENES, THE IMPROVEMENT WHICH COMPRISES PREWASHING SAID STREAM WITH A COPPER AMMONIUM ACETATE SOLUTION CONTAINING AT
Claim 2
Dependent Claim
72 words
IN A PREWASHING OPERATION WHEREIN ACETYLENIC COMPOUNDS ARE REMOVED FROM A DIOLEFIN-RICH STREAM BY EXTRACTION OF SAID STREAMS IN AN EXTRACTION ZONE WITH AN AQUEOUS AMMONIACAL COPPER SALT SOLUTION TO FORM AN EXTRACT CONTAINING SAID ACETYLENIC COMPOUNDS AND A MINOR AMOUNT OF SAID DIOLEFINS, AND WHERIN SAID EXTRACT IS STRIPPED IN A STRIPPING ZONE TO RECOVER ACETYLENES, THE IMPROVEMENT WHICH COMPRISES PREWASHING SAID STREAM WITH A COPPER AMMONIUM ACETATE SOLUTION CONTAINING AT
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) | 1962-01-19 | 1962-07-21 | 1963-01-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-01-19 | 1966-07-21 | 1967-01-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-01-19 | 1970-07-21 | 1971-01-20 | $7700.00 | Window Closed / Lapsed |