Patent US3812196A successfully refreshed from Google Patents.
US3812196A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Catalytic steam dealkylation
Assignee: Mitsubishi Chemical Corp
•
Filing: 1971-11-26
•
Granted: 1974-05-21
•
Expires: 1991-11-26
Abstract
Abstract AN ALKYLAROMATIC HYDROCARBON IS DEALKYLATED BY CONTACTING IT, IN THE PRESENCE OF STEAM AND AT A TEMPERATURE RANGING FROM 350 TO 500* C., WITH A CATALYST COMPRISING NICKEL, AND AT LEAST ONE METAL SELECTED FROM PALLADIUM, IRON, IRIDIUM, RHODIUM, THALLIUM, CERIUM, SELENIUM, ANTIMONY, CADMIUM, TUNGSTEN, BARIUM, SODIUM, POTASSIUM, AND RHENIUM, SUPPORTED ON A CARRIER, PREFERABLY ALUMINA.
Inventors
- 👤 M Uchiyama
- 👤 N Kaneko
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 07:50
CPC Classifications
C; C07; C07C; C07C4/00; C07C4/08; C07C4/12; C07C4/14; C07C4/20; B; B01; B01J; B01J23/00; B01J23/38; B01J23/40; B01J23/70; B01J23/74; B01J23/755; B01J23/76; B01J23/89; B01J23/892; C07C2523/00; C07C2523/02; C07C2523/04; C07C2523/06; C07C2523/08; C07C2523/10; C07C2523/16; C07C2523/18; C07C2523/24; C07C2523/30; C07C2523/32; C07C2523/36; C07C2523/38; C07C2523/40; C07C2523/44; C07C2523/46; C07C2523/70; C07C2523/74; C07C2523/745; C07C2523/755; C07C2527/00; C07C2527/02; C07C2527/057; Y; Y10; Y10S; Y10S585/00; Y10S585/8995; Y10S585/906
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1977-05-20 | 1977-11-19 | 1978-05-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-05-20 | 1981-11-19 | 1982-05-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-05-20 | 1985-11-19 | 1986-05-21 | $7700.00 | Window Closed / Lapsed |