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US3242644A
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Process for removing acid constituents from gaseous mixtures
Assignee: Union Oil Company of California
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Filing: 1962-12-27
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Granted: 1966-03-29
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Expires: 1982-12-27
Abstract
No abstract record available.
Inventors
- 👤 Byron B Woertz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 16:57
CPC Classifications
B; B01; B01D; B01D53/00; B01D53/34; B01D53/46; B01D53/62; C; C07; C07C; C07C67/00; C07C67/48; C07C67/52; C07C67/54; C07C67/60; C07C67/62
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
53 words
THE PROCESS OF REMOVING GASEOUS ACID GAS SELECTED FROM THE GROUP CONSISTING OF CARBON DIOXIDE AND HYDROGEN SULFIDE FROM ADMIXTURE WITH GASEOUS C1-C3 ALKANE HYDROCARBONS WHICH COMPRISES CONTACTING SAID GASEOUS ADMIXTURE INA FIRST CONTACTING ZONE WITH A MIXTURE OF A FIRST SOLVENT CONSISTING ESSENTIALLY OF AT LEAST ONE KETO-ACID ESTER OF THE FORMULA,
References Cited (Backward Citations)
CA596692A
Cited
CA596693A
Cited
US2139375A
Cited
US2486778A
Cited
US2863527A
Cited
GB728444A
Cited
US2668748A
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GB750399A
Cited
US2781863A
Cited
US2926751A
Cited
US3137654A
Cited
US3097917A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-03-28 | 1969-09-27 | 1970-03-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-03-28 | 1973-09-27 | 1974-03-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-03-28 | 1977-09-27 | 1978-03-29 | $7700.00 | Window Closed / Lapsed |