Patent US2094909A successfully refreshed from Google Patents.
US2094909A
Expired / Lapsed
US
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Apparatus for treatment of sewage
Assignee: Individual
•
Filing: 1933-03-02
•
Granted: 1937-10-05
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Expires: 1953-03-02
Abstract
No abstract record available.
Inventors
- 👤 Robert W Baily
- 👤 Newenham A Gray
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 03:43
CPC Classifications
C; C02; C02F; C02F1/00; C02F1/24; Y; Y10; Y10S; Y10S159/00; Y10S159/905
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) | 1940-10-04 | 1941-04-05 | 1941-10-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1944-10-04 | 1945-04-05 | 1945-10-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1948-10-04 | 1949-04-05 | 1949-10-05 | $7700.00 | Window Closed / Lapsed |