Patent US1848346A successfully refreshed from Google Patents.
US1848346A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for conducting chemical reactions
Assignee: Dow Chemical Co
•
Filing: 1927-02-01
•
Granted: 1932-03-08
•
Expires: 1947-02-01
Abstract
No abstract record available.
Inventors
- 👤 Jr Thomas Griswold
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 18:02
CPC Classifications
B; B01; B01J; B01J15/00; B01J15/005; C; C01; C01B; C01B32/00; C01B32/70
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) | 1935-03-08 | 1935-09-07 | 1936-03-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1939-03-08 | 1939-09-07 | 1940-03-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1943-03-08 | 1943-09-07 | 1944-03-08 | $7700.00 | Window Closed / Lapsed |