US2437828A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Alkylation of aromatic hydrocarbons with sulfuric acid catalyst avoiding sulfonationof product
Assignee: TIDE WATER ASSOCIATED OIL Co
•
Filing: 1944-02-14
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Granted: 1948-03-16
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Expires: 1964-02-14
Abstract
No abstract record available.
Inventors
- 👤 Daniel J Lyons
- 👤 Lazar Arthur
- 👤 Lloyd L Ingraham
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 11:36
CPC Classifications
C; C07; C07C; C07C2/00; C07C2/54; C07C2/64; C07C2/66; C07C2/70; C07C2527/00; C07C2527/02; C07C2527/053; C07C2527/054
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1938162A
Cited
US1670505A
Cited
US1994249A
Cited
US2001907A
Cited
US2143493A
Cited
US2276171A
Cited
US2349415A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-03-16 | 1951-09-15 | 1952-03-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-03-16 | 1955-09-15 | 1956-03-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-03-16 | 1959-09-15 | 1960-03-16 | $7700.00 | Window Closed / Lapsed |