Patent US2960843A successfully refreshed from Google Patents.
US2960843A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Crystallizing apparatus
Assignee: Individual
•
Filing: 1957-09-23
•
Granted: 1960-11-22
•
Expires: 1977-09-23
Abstract
No abstract record available.
Inventors
- 👤 Ewald A Zdansky
- 👤 Heinrich H Geffcken
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 09:43
CPC Classifications
B; B01; B01D; B01D9/00; B01D9/0004; B01D9/0013; B01D9/005
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2734345A
Cited
US1694369A
Cited
US1880925A
Cited
US1780267A
Cited
US2522651A
Cited
US2682155A
Cited
US2723534A
Cited
US2777888A
Cited
US2800001A
Cited
US2790493A
Cited
US2790309A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-11-22 | 1964-05-23 | 1964-11-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-11-22 | 1968-05-23 | 1968-11-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-11-22 | 1972-05-23 | 1972-11-22 | $7700.00 | Window Closed / Lapsed |