Patent US2570263A successfully refreshed from Google Patents.
US2570263A
Expired / Lapsed
US
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Production of beta-ethylnaphthalene
Assignee: Beazer East Inc
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Filing: 1948-06-08
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Granted: 1951-10-09
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Expires: 1968-06-08
Abstract
No abstract record available.
Inventors
- 👤 Joseph E Nickels
- 👤 Walter M Kutz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 20:50
CPC Classifications
C; C07; C07C; C07C15/00; C07C15/20; C07C15/24; C07C2/00; C07C2/54; C07C2/64; C07C2/66; C07C7/00; C07C7/14; C07C2521/00; C07C2521/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
96 words
IN A PROCESS FOR THE MANUFACTURE BY THE ALKYLATION OF NAPHTHALENE WITH ETHYLENE OF A MIXTURE OF MONO-ETHYL NAPHTHALENES CONTAINING A HIGH RATIO OF BETA-ETHYL NAPHTHALENE TO ALPHAETHYL NAPHTHALENE THE STEPS OF HEATING A MIXTURE OF LIQUID NAPHTHALENE AND ETHYLENE IN CONTACT WITH A SILICA-ALUMINA CATALYST AT AN ALKYLATING TEMPERATURE ABOVE 275* C. UNTIL AT AN ALKYLATE CONTAINING AT LEAST 3 PARTS OF BETA ISOMER FOR EACH PART OF ALPHA ISOMER IS OBTAINED, SEPARATING A PORTION OF THE BETA ISOMER FROM THE ALKYLATE THUS OBTAINED, AND RECYCLING THE REMAINDER OF THE ETHYL NAPHTHALENES TO SAID ALKYLATION.
Claim 2
Dependent Claim
96 words
IN A PROCESS FOR THE MANUFACTURE BY THE ALKYLATION OF NAPHTHALENE WITH ETHYLENE OF A MIXTURE OF MONO-ETHYL NAPHTHALENES CONTAINING A HIGH RATIO OF BETA-ETHYL NAPHTHALENE TO ALPHAETHYL NAPHTHALENE THE STEPS OF HEATING A MIXTURE OF LIQUID NAPHTHALENE AND ETHYLENE IN CONTACT WITH A SILICA-ALUMINA CATALYST AT AN ALKYLATING TEMPERATURE ABOVE 275* C. UNTIL AT AN ALKYLATE CONTAINING AT LEAST 3 PARTS OF BETA ISOMER FOR EACH PART OF ALPHA ISOMER IS OBTAINED, SEPARATING A PORTION OF THE BETA ISOMER FROM THE ALKYLATE THUS OBTAINED, AND RECYCLING THE REMAINDER OF THE ETHYL NAPHTHALENES TO SAID ALKYLATION.
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) | 1954-10-08 | 1955-04-09 | 1955-10-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-10-08 | 1959-04-09 | 1959-10-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-10-08 | 1963-04-09 | 1963-10-09 | $7700.00 | Window Closed / Lapsed |