US2442241A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sewage treatment process
Assignee: Individual
•
Filing: 1946-08-26
•
Granted: 1948-05-25
•
Expires: 1966-08-26
Abstract
No abstract record available.
Inventors
- 👤 John E Koruzo
- 👤 Kathryn J Mulvaney
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 05:15
CPC Classifications
C; C02; C02F; C02F3/00; C02F3/28; C02F3/30; C02F3/302
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB218399A
Cited
US2089162A
Cited
US2190598A
Cited
US2228017A
Cited
US2254953A
Cited
US2359004A
Cited
US2404223A
Cited
US2349390A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-05-25 | 1951-11-24 | 1952-05-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-05-25 | 1955-11-24 | 1956-05-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-05-25 | 1959-11-24 | 1960-05-25 | $7700.00 | Window Closed / Lapsed |