US2338419A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Filtering and like treatment of fluids
Assignee: Individual
•
Filing: 1941-07-08
•
Granted: 1944-01-04
•
Expires: 1961-07-08
Abstract
No abstract record available.
Inventors
- 👤 Forrest William James
- 👤 Brown Charles Hall
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 08:06
CPC Classifications
B; B01; B01D; B01D35/00; B01D35/26; B01D29/00; B01D29/11; B01D29/13; B01D29/15; B01D29/62; B01D29/66; B01D29/665
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) | 1947-01-03 | 1947-07-05 | 1948-01-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1951-01-03 | 1951-07-05 | 1952-01-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1955-01-03 | 1955-07-05 | 1956-01-04 | $7700.00 | Window Closed / Lapsed |