US3474033A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process and plant for sewage treatment
Assignee: Ultra Dynamics Corp
•
Filing: 1967-04-27
•
Granted: 1969-10-21
•
Expires: 1987-04-27
Abstract
No abstract record available.
Inventors
- 👤 Orin C Stout
- 👤 Dale E Wiltrout
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 03:18
CPC Classifications
C; C02; C02F; C02F1/00; C02F1/52; C02F1/5236; C02F1/28; C02F1/283; C02F1/5281
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US636497A
Cited
US1440253A
Cited
US1440254A
Cited
US1633079A
Cited
US1876123A
Cited
US2128393A
Cited
US2106851A
Cited
US2852584A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-10-20 | 1973-04-21 | 1973-10-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-10-20 | 1977-04-21 | 1977-10-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-10-20 | 1981-04-21 | 1981-10-21 | $7700.00 | Window Closed / Lapsed |