US2814388A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Screening device
Assignee: Stamicarbon BV
•
Filing: 1957-03-18
•
Granted: 1957-11-26
•
Expires: 1977-03-18
Abstract
No abstract record available.
Inventors
- 👤 Freerk J Fontein
- 👤 Hubert H Dreissen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 00:32
CPC Classifications
B; B07; B07B; B07B1/00; B07B2230/00; B07B2230/01
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1185595A
Cited
US2748941A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-11-25 | 1961-05-27 | 1961-11-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-11-25 | 1965-05-27 | 1965-11-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-11-25 | 1969-05-27 | 1969-11-26 | $7700.00 | Window Closed / Lapsed |