Patent JPS5385976A successfully refreshed from Google Patents.
US2545671A
Expired / Lapsed
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Alkylation of aromatic hydrocarbons
Assignee: MW Kellogg Co
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Filing: 1947-04-15
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Granted: 1951-03-20
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Expires: 1967-04-15
Abstract
No abstract record available.
Inventors
- 👤 Herbert J Passino
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 05:56
CPC Classifications
C; C07; C07C; C07C2/00; C07C2/54; C07C2/64; C07C2/66; C07C2/70; C07C2527/00; C07C2527/06; C07C2527/08; C07C2527/12; C07C2527/1206; C07C2527/1213; Y; Y02; Y02P; Y02P20/00; Y02P20/50; Y02P20/582
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
55 words
IN A PROCESS OF ALKYLATING AROMATIC COMPOUNDS, REACTING AN OLEFIN-CONTAINING GAS WITH AN AROMATIC HYDROCARBON BY VAPOR PHASE HYDROGEN FLUORIDE CATALYST PROMOTED BY BORON FLUORIDE AT A TEMPERATURE AT WHICH THE REACTION PROCEEDS WITHOUT SUBSTANTIAL POLYMERIZATION AND AT A PRESSURE TO MAINTAIN THE HYDROGEN FLUORIDE AND BORON TRIFLUORIDE IN THE VAPOR PHASE AT SAID TEM-
Claim 2
Dependent Claim
55 words
IN A PROCESS OF ALKYLATING AROMATIC COMPOUNDS, REACTING AN OLEFIN-CONTAINING GAS WITH AN AROMATIC HYDROCARBON BY VAPOR PHASE HYDROGEN FLUORIDE CATALYST PROMOTED BY BORON FLUORIDE AT A TEMPERATURE AT WHICH THE REACTION PROCEEDS WITHOUT SUBSTANTIAL POLYMERIZATION AND AT A PRESSURE TO MAINTAIN THE HYDROGEN FLUORIDE AND BORON TRIFLUORIDE IN THE VAPOR PHASE AT SAID TEM-
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) | 1954-03-19 | 1954-09-18 | 1955-03-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-03-19 | 1958-09-18 | 1959-03-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-03-19 | 1962-09-18 | 1963-03-20 | $7700.00 | Window Closed / Lapsed |