US2542610A
Expired / Lapsed
US
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Friedel-crafts double salt catalyst
Assignee: Standard Oil Development Co
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Filing: 1949-02-08
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Granted: 1951-02-20
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Expires: 1969-02-08
Abstract
No abstract record available.
Inventors
- 👤 David W Young
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:47
CPC Classifications
B; B01; B01J; B01J27/00; B01J27/06; C; C08; C08F; C08F10/00; Y; Y10; Y10S; Y10S260/00; Y10S260/25
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
23 words
A CATALYST CONSISTING ESSENTIALLY OF A DOUBLE SALT OF A FRIEDEL-CRAFTS CATALYTICALLY ACTIVE METAL HALIDE WITH A FRIEDEL-CRAFTS CATALYTICALLY ACTIVE METAL OXY HALIDE.
Claim 2
Dependent Claim
23 words
A CATALYST CONSISTING ESSENTIALLY OF A DOUBLE SALT OF A FRIEDEL-CRAFTS CATALYTICALLY ACTIVE METAL HALIDE WITH A FRIEDEL-CRAFTS CATALYTICALLY ACTIVE METAL OXY HALIDE.
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) | 1954-02-19 | 1954-08-21 | 1955-02-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-02-19 | 1958-08-21 | 1959-02-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-02-19 | 1962-08-21 | 1963-02-20 | $7700.00 | Window Closed / Lapsed |