Patent US2942730A successfully refreshed from Google Patents.
US2942730A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for wet screening
Assignee: Stamicarbon BV
•
Filing: 1957-06-03
•
Granted: 1960-06-28
•
Expires: 1977-06-03
Abstract
No abstract record available.
Inventors
- 👤 Freerk J Fontein
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:42
CPC Classifications
B; B07; B07B; B07B1/00; B07B2230/00; B07B2230/01
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US794877A
Cited
US1135304A
Cited
US1180703A
Cited
US1333127A
Cited
GB264536A
Cited
GB292054A
Cited
GB291530A
Cited
GB425877A
Cited
DE658759C
Cited
BE515859A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-06-28 | 1963-12-28 | 1964-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-06-28 | 1967-12-28 | 1968-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-06-28 | 1971-12-28 | 1972-06-28 | $7700.00 | Window Closed / Lapsed |