Patent US2515237A successfully refreshed from Google Patents.
US2515237A
Expired / Lapsed
US
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Production of beta-ethylnaphthalene
Assignee: Beazer East Inc
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Filing: 1947-07-12
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Granted: 1950-07-18
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Expires: 1967-07-12
Abstract
No abstract record available.
Inventors
- 👤 Walter M Kutz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 05:06
CPC Classifications
C; C07; C07C; C07C15/00; C07C15/20; C07C15/24; C07C2/00; C07C2/54; C07C2/64; C07C2/66; C07C2521/00; C07C2521/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
68 words
IN A PROCESS FOR THE MANUFACTURE BY THE ALKYLATION OF NAPTHALENE WITH ETHYLENE OF A MIXTURE OF MONO-ETHYLNAPHTHALENES CONTAINING A HIGH RATIO OF BETA-ETHYLNAPHTHALENE TO ALPHAETHYLNAPHTHALENE THE STPS OF HEATING A MIXTURE OF LIQUID NAPHTHALENE AND ETHYLENE IN CONTACT WITH A SILICA-ALUMINA CATALYST AT AN ALKYLATING TEMPERATURE ABOVE 275*C. UNTIL AN ALKYLATE CONTAINING AT LEAST 3 PARTS OF BETA ISOMER FOR EACH PART OF ALPHA ISOMER IS OBTAINED.
Claim 2
Dependent Claim
68 words
IN A PROCESS FOR THE MANUFACTURE BY THE ALKYLATION OF NAPTHALENE WITH ETHYLENE OF A MIXTURE OF MONO-ETHYLNAPHTHALENES CONTAINING A HIGH RATIO OF BETA-ETHYLNAPHTHALENE TO ALPHAETHYLNAPHTHALENE THE STPS OF HEATING A MIXTURE OF LIQUID NAPHTHALENE AND ETHYLENE IN CONTACT WITH A SILICA-ALUMINA CATALYST AT AN ALKYLATING TEMPERATURE ABOVE 275*C. UNTIL AN ALKYLATE CONTAINING AT LEAST 3 PARTS OF BETA ISOMER FOR EACH PART OF ALPHA ISOMER IS OBTAINED.
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) | 1953-07-17 | 1954-01-16 | 1954-07-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-07-17 | 1958-01-16 | 1958-07-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-07-17 | 1962-01-16 | 1962-07-18 | $7700.00 | Window Closed / Lapsed |