US3260764A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Transmethylation and disproportionation of aromatics
Assignee: Sinclair Research Inc
•
Filing: 1962-01-05
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Granted: 1966-07-12
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Expires: 1982-01-05
Abstract
No abstract record available.
Inventors
- 👤 Stephen M Kovach
- 👤 Glenn O Michaels
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 12:08
CPC Classifications
B; B01; B01J; B01J23/00; B01J23/16; B01J23/24; B01J23/26; C; C07; C07C; C07C6/00; C07C6/08; C07C6/12; C07C6/123; C07C6/126
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
55 words
A PROCESS FOR TREATING POLYALKYL AROMATICS WHICH COMPRISES CONTACTING A POLYALKYL AROMATIC FEEDSTOCK UNDER TRANSMETHYLATION AND DISPROPORTIONATION CONDITIONS AT A TEMPERATURE BETWEEN ABOUT 400 TO 1000*F. AND IN THE PRESENCE OF A CATALYST CONSISTING ESSENTIALLY OF ABOUT 1 TO 20 WEIGHT PERCENT BORIA, ABOUT 1 TO 20 WEIGHT PERCENT CHROMIA ON A CALCINED ALUMINA BASE.
Claim 2
Dependent Claim
55 words
A PROCESS FOR TREATING POLYALKYL AROMATICS WHICH COMPRISES CONTACTING A POLYALKYL AROMATIC FEEDSTOCK UNDER TRANSMETHYLATION AND DISPROPORTIONATION CONDITIONS AT A TEMPERATURE BETWEEN ABOUT 400 TO 1000*F. AND IN THE PRESENCE OF A CATALYST CONSISTING ESSENTIALLY OF ABOUT 1 TO 20 WEIGHT PERCENT BORIA, ABOUT 1 TO 20 WEIGHT PERCENT CHROMIA ON A CALCINED ALUMINA BASE.
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) | 1969-07-11 | 1970-01-10 | 1970-07-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-07-11 | 1974-01-10 | 1974-07-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-07-11 | 1978-01-10 | 1978-07-12 | $7700.00 | Window Closed / Lapsed |