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US2222012A
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Alkylation of aromatic compounds
Assignee: Dow Chemical Co
•
Filing: 1938-04-12
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Granted: 1940-11-19
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Expires: 1958-04-12
Abstract
No abstract record available.
Inventors
- 👤 James L Amos
- 👤 Jack L Williams
- 👤 Henry S Winnicki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:32
CPC Classifications
C; C07; C07C; C07C2/00; C07C2/54; C07C2/64; C07C2/66; C07C2/68; C07C2527/00; C07C2527/06; C07C2527/125; C07C2527/126; C07C2531/00; C07C2531/02; C07C2531/12; Y; Y10; Y10S; Y10S585/00; Y10S585/8995; Y10S585/901; Y10S585/902
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1943-11-19 | 1944-05-20 | 1944-11-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1947-11-19 | 1948-05-20 | 1948-11-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1951-11-19 | 1952-05-20 | 1952-11-19 | $7700.00 | Window Closed / Lapsed |