Patent US2358841A successfully refreshed from Google Patents.
US2358841A
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Sewage screening system
Assignee: American Well Works
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Filing: 1940-03-04
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Granted: 1944-09-26
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Expires: 1960-03-04
Abstract
No abstract record available.
Inventors
- 👤 James D Walker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 18:53
CPC Classifications
E; E03; E03F; E03F5/00; E03F5/14; B; B01; B01D; B01D29/00; B01D29/11
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) | 1947-09-26 | 1948-03-27 | 1948-09-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1951-09-26 | 1952-03-27 | 1952-09-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1955-09-26 | 1956-03-27 | 1956-09-26 | $7700.00 | Window Closed / Lapsed |