Patent US3578723A successfully refreshed from Google Patents.
US3578723A
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US
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Isomerization and disproportionation of aromatic hydrocarbons
Assignee: Mobil Oil AS
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Filing: 1968-04-18
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Granted: 1971-05-11
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Expires: 1988-04-18
Abstract
Abstract A NEW AND UNUSUAL FAMILY OF CRYSTALLINE ZEOLITES IDENTIFIED AS ZEOLITE ZSM-4 ARE USED AS CATALYSTS FOR THE ISOMERIZATION AND DISPROPORTIONATION OF AROMATIC HYDROCARBONS.
Inventors
- 👤 Emmerson Bowes
- 👤 John J Wise
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 17:47
CPC Classifications
C; C07; C07C; C07C6/00; C07C6/08; C07C6/12; B; B01; B01J; B01J29/00; B01J29/04; B01J29/06; B01J29/50; B01J29/70; B01J29/7011; C07C5/00; C07C5/22; C07C5/27; C07C5/2702; C07C5/2708; C07C5/2729; C07C5/2732; C07C5/2737; C07C2529/00; C07C2529/04; C07C2529/06; C07C2529/064
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) | 1974-05-10 | 1974-11-09 | 1975-05-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-05-10 | 1978-11-09 | 1979-05-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-05-10 | 1982-11-09 | 1983-05-11 | $7700.00 | Window Closed / Lapsed |