US2125310A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of alkylating phenols
Assignee: Dow Chemical Co
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Filing: 1936-05-01
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Granted: 1938-08-02
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Expires: 1956-05-01
Abstract
No abstract record available.
Inventors
- 👤 Ralph P Perkins
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 16:53
CPC Classifications
C; C07; C07C; C07C37/00; C07C37/11; C07C37/14; C07C37/16; C07C2601/00; C07C2601/12; C07C2601/14
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) | 1941-08-01 | 1942-01-31 | 1942-08-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1945-08-01 | 1946-01-31 | 1946-08-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1949-08-01 | 1950-01-31 | 1950-08-02 | $7700.00 | Window Closed / Lapsed |