US2996182A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process and apparatus for wet screening
Assignee: Stamicarbon BV
•
Filing: 1958-04-18
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Granted: 1961-08-15
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Expires: 1978-04-18
Abstract
No abstract record available.
Inventors
- 👤 Freerk J Fontein
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 09:55
CPC Classifications
B; B07; B07B; B07B1/00; B07B2230/00; B07B2230/01
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1135304A
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US1685512A
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US2569141A
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US2835387A
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US2717695A
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FR1072467A
Cited
US2855099A
Cited
US2833413A
Cited
US2860782A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-08-14 | 1965-02-13 | 1965-08-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-08-14 | 1969-02-13 | 1969-08-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-08-14 | 1973-02-13 | 1973-08-15 | $7700.00 | Window Closed / Lapsed |