Patent US2028043A successfully refreshed from Google Patents.
US2028043A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cumyl phenol
Assignee: Dow Chemical Co
•
Filing: 1934-02-13
•
Granted: 1936-01-14
•
Expires: 1954-02-13
Abstract
No abstract record available.
Inventors
- 👤 Edgar C Britton
- 👤 Lawrence F Martin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 15:54
CPC Classifications
C; C07; C07C; C07C37/00; C07C37/11; C07C37/14; C07C37/18; C07C39/00; C07C39/12; C07C39/15
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1939-01-13 | 1939-07-15 | 1940-01-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1943-01-13 | 1943-07-15 | 1944-01-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1947-01-13 | 1947-07-15 | 1948-01-14 | $7700.00 | Window Closed / Lapsed |