US3801669A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Purification of hydrocarbons
Assignee: Texas Petrochemicals Corp
•
Filing: 1972-02-03
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Granted: 1974-04-02
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Expires: 1992-02-03
Abstract
Abstract GASEOUS STREAMS CONTAINING CARBOXYL COMPOUNDS ARE REDUCED IN CARBONYL COMPOUNDS BY REACTING A VAPOR PHASE WITH CATALYST COMPRISING CEMENT. REACTOR EFFLUENT FROM OXIDATIVE DEHYDROGENATION REACTION TO PRODUCE BUTADIENE1,3 IS REACTED WITH PORTLAND CEMENT CATALYST TO REMOVE CARBONYL COMPOUNDS.
Inventors
- 👤 H Christmann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:50
CPC Classifications
C; C07; C07C; C07C11/00; C07C11/12; C07C11/16; C07C11/167; B; B01; B01J; B01J23/00; B01J23/02; B01J23/04; C07C5/00; C07C5/42; C07C5/48; C07C7/00; C07C7/148
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-04-01 | 1977-10-01 | 1978-04-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-04-01 | 1981-10-01 | 1982-04-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-04-01 | 1985-10-01 | 1986-04-02 | $7700.00 | Window Closed / Lapsed |