US2034784A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for filtering and washing mixtures of solid and liquid substances
Assignee: KEMISKA PATENTER AB
•
Filing: 1933-08-09
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Granted: 1936-03-24
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Expires: 1953-08-09
Abstract
No abstract record available.
Inventors
- 👤 Wallny John Gunnar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 18:38
CPC Classifications
B; B01; B01D; B01D33/00; B01D33/04; B01D33/056; B01D33/44; B01D33/46; B01D33/463; B01D33/58; B01D33/60; B01D33/62; B01D33/64; B01D33/646; B01D33/70; B01D33/72; B01D33/74; B01D33/745
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1939-03-24 | 1939-09-23 | 1940-03-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1943-03-24 | 1943-09-23 | 1944-03-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1947-03-24 | 1947-09-23 | 1948-03-24 | $7700.00 | Window Closed / Lapsed |