Patent US1862243A successfully refreshed from Google Patents.
US1862243A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for recovering acid and heat units thereof from digesters and for preparing digester liquor
Assignee: Chemipulp Process Inc
•
Filing: 1927-03-28
•
Granted: 1932-06-07
•
Expires: 1947-03-28
Abstract
No abstract record available.
Inventors
- 👤 Strindlund John
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 13:28
CPC Classifications
D; D21; D21C; D21C11/00; D21C11/06; Y; Y02; Y02P; Y02P70/00; Y02P70/10
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) | 1935-06-07 | 1935-12-07 | 1936-06-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1939-06-07 | 1939-12-07 | 1940-06-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1943-06-07 | 1943-12-07 | 1944-06-07 | $7700.00 | Window Closed / Lapsed |