US2985693A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manufacture of aromatic hydrocarbons
Assignee: Hoechst AG
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Filing: 1959-02-13
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Granted: 1961-05-23
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Expires: 1979-02-13
Abstract
No abstract record available.
Inventors
- 👤 Probst Otto
- 👤 Hieronymus Ernst
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 23:15
CPC Classifications
C; C07; C07C; C07C5/00; C07C5/32; C07C5/373; C07C5/393; C07C5/41; C07C5/412
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
51 words
IN A METHOD OF AROMATIZING AN ALIPHATIC HYDROCARBON SELECTED FROM THE GROUP CONSISTING OF DIISOBUTYLENE TRIISOBUTYLENE, HYDROGENATIOIN PRODUCTS THEREOF AND MIXTURES THEREOF BY PASSING VAPORS OF SAID HYDROCARBONS OVER AN AROMATIZATION CATALYST AT AN ELEVATED TEMPERATURE, THE IMPROVEMENT WHICH COMPRISES CARRYING OUT THE AROMATIZATION UNDER A PRESSURE LOWER THAN 0.5 ATMOSPHERE.
Claim 2
Dependent Claim
51 words
IN A METHOD OF AROMATIZING AN ALIPHATIC HYDROCARBON SELECTED FROM THE GROUP CONSISTING OF DIISOBUTYLENE TRIISOBUTYLENE, HYDROGENATIOIN PRODUCTS THEREOF AND MIXTURES THEREOF BY PASSING VAPORS OF SAID HYDROCARBONS OVER AN AROMATIZATION CATALYST AT AN ELEVATED TEMPERATURE, THE IMPROVEMENT WHICH COMPRISES CARRYING OUT THE AROMATIZATION UNDER A PRESSURE LOWER THAN 0.5 ATMOSPHERE.
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) | 1964-05-22 | 1964-11-21 | 1965-05-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-05-22 | 1968-11-21 | 1969-05-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-05-22 | 1972-11-21 | 1973-05-23 | $7700.00 | Window Closed / Lapsed |