Patent US2322195A successfully refreshed from Google Patents.
US3391206A
Expired / Lapsed
US
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Preparation of cyclic alkenes
Assignee: Stamicarbon BV
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Filing: 1965-04-05
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Granted: 1968-07-02
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Expires: 1985-04-05
Abstract
No abstract record available.
Inventors
- 👤 Hartog Frits
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:00
CPC Classifications
C; C07; C07C; C07C5/00; C07C5/02; C07C5/10; C07C5/11; C07C2523/00; C07C2523/38; C07C2523/40; C07C2523/46
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
37 words
A PROCESS FOR THE COVERSION OF AROMATIC HYDROCARBON TO THE CORRESPONDING CYCLOALKENE WHICH CONSISTS ESSENTIALLY IN PARTIALLY HYDROGENATING SAID HYDROCARBON IN THE PRESENCE OF A LOWER ALKANOL AS SOLVENT WITH MOLECULAR HYDROGEN GAS AND WITH RUTHENIUM CATALYST.
Claim 2
Dependent Claim
37 words
A PROCESS FOR THE COVERSION OF AROMATIC HYDROCARBON TO THE CORRESPONDING CYCLOALKENE WHICH CONSISTS ESSENTIALLY IN PARTIALLY HYDROGENATING SAID HYDROCARBON IN THE PRESENCE OF A LOWER ALKANOL AS SOLVENT WITH MOLECULAR HYDROGEN GAS AND WITH RUTHENIUM CATALYST.
References Cited (Backward Citations)
US2360555A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-07-02 | 1972-01-01 | 1972-07-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-07-02 | 1976-01-01 | 1976-07-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-07-02 | 1980-01-01 | 1980-07-02 | $7700.00 | Window Closed / Lapsed |