US2954413A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cracking of 1.1-diarylethanes
Assignee: BASF SE
•
Filing: 1957-01-29
•
Granted: 1960-09-27
•
Expires: 1977-01-29
Abstract
No abstract record available.
Inventors
- 👤 Kroeper Hugo
- 👤 Platz Rolf
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 01:34
CPC Classifications
C; C07; C07C; C07C4/00; C07C2521/00; C07C2521/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
68 words
A PROCESS FOR THE CATALYTIC CRACKING OF 1,1-DIARYLETHANES WHICH COMPRISES PASSING A MIXTURE OF 1,1-DIARYLETHANES AND WATER VAPOR THROUGH A FLUIDIZED CATALYST BED CONSISTING OF SYNTHETIC MAGNESIUM SILICATE, AT A TEMPERATURE OF 350* TO 620*C. AND UNDER A PRESSURE OF FROM 10 TO 150 MM. HG, THE SAID MIXTURE BEING IN A MOLAR RATIO OF FROM 4 TO 40 MOLS OF WATER VAPOR TO 1 MOL OF 1,1-DIARYLETHANE.
Claim 2
Dependent Claim
68 words
A PROCESS FOR THE CATALYTIC CRACKING OF 1,1-DIARYLETHANES WHICH COMPRISES PASSING A MIXTURE OF 1,1-DIARYLETHANES AND WATER VAPOR THROUGH A FLUIDIZED CATALYST BED CONSISTING OF SYNTHETIC MAGNESIUM SILICATE, AT A TEMPERATURE OF 350* TO 620*C. AND UNDER A PRESSURE OF FROM 10 TO 150 MM. HG, THE SAID MIXTURE BEING IN A MOLAR RATIO OF FROM 4 TO 40 MOLS OF WATER VAPOR TO 1 MOL OF 1,1-DIARYLETHANE.
References Cited (Backward Citations)
US2361044A
Cited
US2422171A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-09-27 | 1964-03-28 | 1964-09-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-09-27 | 1968-03-28 | 1968-09-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-09-27 | 1972-03-28 | 1972-09-27 | $7700.00 | Window Closed / Lapsed |