Patent US2309002A successfully refreshed from Google Patents.
US2309002A
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US
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Apparatus for sewage treatment
Assignee: Jeffrey Manufacturing Co
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Filing: 1940-12-10
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Granted: 1943-01-19
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Expires: 1960-12-10
Abstract
No abstract record available.
Inventors
- 👤 Richard D Nichols
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 18:38
CPC Classifications
B; B01; B01D; B01D21/00; B01D21/24; B01D21/2405; B01D21/0039; B01D21/0042; B01D21/18; B01D21/183; B01D21/2444; B01D21/245; B01D21/2455
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) | 1946-01-18 | 1946-07-20 | 1947-01-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1950-01-18 | 1950-07-20 | 1951-01-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1954-01-18 | 1954-07-20 | 1955-01-19 | $7700.00 | Window Closed / Lapsed |