US2267290A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stabilization of buffered formaldehyde solutions
Assignee: Rohm and Haas Co
•
Filing: 1939-05-25
•
Granted: 1941-12-23
•
Expires: 1959-05-25
Abstract
No abstract record available.
Inventors
- 👤 Ian C Somerville
- 👤 Harold G Turley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 09:26
CPC Classifications
C; C07; C07C; C07C47/00; C07C47/02; C07C47/04; C07C45/00; C07C45/78
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) | 1944-12-22 | 1945-06-23 | 1945-12-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1948-12-22 | 1949-06-23 | 1949-12-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1952-12-22 | 1953-06-23 | 1953-12-23 | $7700.00 | Window Closed / Lapsed |