US2623580A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Centrifugal evaporator
Assignee: Cellulose du Pin SA
•
Filing: 1947-03-05
•
Granted: 1952-12-30
•
Expires: 1967-03-05
Abstract
No abstract record available.
Inventors
- 👤 Arnaud Jean Claude
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 15:06
CPC Classifications
B; B01; B01D; B01D1/00; B01D1/22; B01D1/222; B01D1/228; B01D3/00; B01D3/08; D; D21; D21C; D21C11/00; D21C11/10
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US547128A
Cited
US1324417A
Cited
US1420648A
Cited
AT42872B
Cited
US1032147A
Cited
US1420641A
Cited
US1375210A
Cited
US1525808A
Cited
US1689671A
Cited
US1818711A
Cited
FR698802A
Cited
FR40163E
Cited
US2188220A
Cited
US2254867A
Cited
US2361726A
Cited
US2305226A
Cited
US2401988A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-12-30 | 1956-06-30 | 1956-12-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-12-30 | 1960-06-30 | 1960-12-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-12-30 | 1964-06-30 | 1964-12-30 | $7700.00 | Window Closed / Lapsed |