US3337647A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for preparing 1, 3-dimethyl-4-isopropylbenzol and 1, 3-dimethyl-4, 6-diisopropylbenzol
Assignee: Rutgerswerke und Teerverwertung AG
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Filing: 1965-05-03
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Granted: 1967-08-22
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Expires: 1985-05-03
Abstract
No abstract record available.
Inventors
- 👤 Dr-Ing Hans Binder
- 👤 Dipl-Ing Herbert Mayr
- 👤 Sulo Jozef
- 👤 Dr Rer Nat Johannes Turowski
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 12:52
CPC Classifications
B; B01; B01J; B01J19/00; B01J19/02; C; C07; C07C; C07C2/00; C07C2/54; C07C2/64; C07C2/66; C07C2/68; B01J2219/00; B01J2219/02; B01J2219/0204; B01J2219/0245; B01J2219/025; B01J2219/0277; C07C2527/00; C07C2527/06; C07C2527/125; C07C2527/126; C07C2531/00; C07C2531/02; Y; Y10; Y10S; Y10S585/00; Y10S585/8995; Y10S585/90
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
33 words
A PROCESS FOR THE CATALYTIC ALKYLATION OF AROMATIC HYDROCARBONS BY MEANS OF OLEFINS IN THE PRESENCE OF ALCL3 AS CATALYST, COMPRISING CARRYING OUT ALKYLATION WITH THE USE OF A PHENOLFORMALDEHYDE RESIN AS CO-CATALYST.
Claim 2
Dependent Claim
33 words
A PROCESS FOR THE CATALYTIC ALKYLATION OF AROMATIC HYDROCARBONS BY MEANS OF OLEFINS IN THE PRESENCE OF ALCL3 AS CATALYST, COMPRISING CARRYING OUT ALKYLATION WITH THE USE OF A PHENOLFORMALDEHYDE RESIN AS CO-CATALYST.
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) | 1970-08-21 | 1971-02-20 | 1971-08-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-08-21 | 1975-02-20 | 1975-08-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-08-21 | 1979-02-20 | 1979-08-22 | $7700.00 | Window Closed / Lapsed |