US2597802A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for treating liquid sewage and the like
Assignee: Individual
•
Filing: 1946-07-17
•
Granted: 1952-05-20
•
Expires: 1966-07-17
Abstract
No abstract record available.
Inventors
- 👤 Stanley E Kappe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 15:21
CPC Classifications
C; C02; C02F; C02F1/00; C02F1/006; C02F3/00; C02F3/02; C02F3/12; Y; Y02; Y02W; Y02W10/00; Y02W10/10
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
GB105654A
Cited
US1139024A
Cited
US1646478A
Cited
US1900809A
Cited
US1902078A
Cited
US1867824A
Cited
US1937434A
Cited
US2024345A
Cited
US2067161A
Cited
US2144385A
Cited
US2154132A
Cited
US2144386A
Cited
US2374772A
Cited
US2400598A
Cited
US2464707A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-05-20 | 1955-11-19 | 1956-05-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-05-20 | 1959-11-19 | 1960-05-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-05-20 | 1963-11-19 | 1964-05-20 | $7700.00 | Window Closed / Lapsed |