Patent US3004085A successfully refreshed from Google Patents.
US3004085A
Expired / Lapsed
US
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Method of preventing fouling
Assignee: Polysar Ltd
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Filing: 1959-06-03
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Granted: 1961-10-10
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Expires: 1979-06-03
Abstract
No abstract record available.
Inventors
- 👤 Joseph E Ewanchyna
- 👤 Charles M Finigan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 12:39
CPC Classifications
C; C10; C10K; C10K1/00; C10K1/08; C10K1/10; C10K1/12; C10K1/124; C10K1/127; C01; C01C; C01C1/00; C01C1/02; C01C1/10; C07; C07C; C07C7/00; C07C7/10; C07C7/11; Y; Y10; Y10S; Y10S585/00; Y10S585/949; Y10S585/95
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
106 words
IN A PROCESS FOR THE SEPARATION OF BUTADIENE FROM A MIXTURE THEREOF WITH OTHER HYDROCARBONS AND HYDROCARBON COMPOUNDS COMPRISING ACETYLENES AND CARBONYLS WITH A CUPROUS AMMONIACAL ACETATE SOLVENT WHEREIN THE GASES STRIPPED FROM THE SOLVENT ARE WATER WASHED FOR THE RECOVERY OF AMMONIA VAPORS AS A DILUTE AQUEOUS AMMONIACAL STREAM CONTAINING ACETYLENES AND HYDROCARBON COMPOUNDS AS CONTAMINANTS AND THE AMMONIA IS SUBSEQUENTLY STRIPPED FROM THE WASH WATER, THE IMPROVEMENT WHICH COMPRISES CONTACTING THE AQUEOUS AMMONIACAL STREAM WITH A LIQUIFIED LIGHT HYDROCARBON CONTAINING 3-5 CARBON ATOMS AND SEPARATING THE LIQUIFIED LIGHT HYDROCARBON WITH CONTAMINANTS DISSOLVED THEREIN FROM THE AQUEOUS AMMONIACAL STREAM BEFORE THE AMMONIA IS STRIPPER THEREFROM.
Claim 2
Dependent Claim
106 words
IN A PROCESS FOR THE SEPARATION OF BUTADIENE FROM A MIXTURE THEREOF WITH OTHER HYDROCARBONS AND HYDROCARBON COMPOUNDS COMPRISING ACETYLENES AND CARBONYLS WITH A CUPROUS AMMONIACAL ACETATE SOLVENT WHEREIN THE GASES STRIPPED FROM THE SOLVENT ARE WATER WASHED FOR THE RECOVERY OF AMMONIA VAPORS AS A DILUTE AQUEOUS AMMONIACAL STREAM CONTAINING ACETYLENES AND HYDROCARBON COMPOUNDS AS CONTAMINANTS AND THE AMMONIA IS SUBSEQUENTLY STRIPPED FROM THE WASH WATER, THE IMPROVEMENT WHICH COMPRISES CONTACTING THE AQUEOUS AMMONIACAL STREAM WITH A LIQUIFIED LIGHT HYDROCARBON CONTAINING 3-5 CARBON ATOMS AND SEPARATING THE LIQUIFIED LIGHT HYDROCARBON WITH CONTAMINANTS DISSOLVED THEREIN FROM THE AQUEOUS AMMONIACAL STREAM BEFORE THE AMMONIA IS STRIPPER THEREFROM.
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) | 1964-10-09 | 1965-04-10 | 1965-10-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-10-09 | 1969-04-10 | 1969-10-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-10-09 | 1973-04-10 | 1973-10-10 | $7700.00 | Window Closed / Lapsed |