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US2423530A
Expired / Lapsed
US
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Alkylation of aryl hydrocarbons
Assignee: Pure Oil Co
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Filing: 1943-12-13
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Granted: 1947-07-08
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Expires: 1963-12-13
Abstract
No abstract record available.
Inventors
- 👤 Carlisle M Thacker
- 👤 Ralph C Swann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 22:21
CPC Classifications
C; C07; C07C; C07C2/00; C07C2/86; C07C2/868; C07C2527/00; C07C2527/06; C07C2527/125; C07C2527/126; C07C2527/128
Claims Analysis
Total Claims: 0
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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) | 1950-07-07 | 1951-01-06 | 1951-07-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-07-07 | 1955-01-06 | 1955-07-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-07-07 | 1959-01-06 | 1959-07-08 | $7700.00 | Window Closed / Lapsed |