US3435954A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Waste water purification apparatus
Assignee: Aqseptence Group GmbH
•
Filing: 1967-03-08
•
Granted: 1969-04-01
•
Expires: 1987-03-08
Abstract
No abstract record available.
Inventors
- 👤 Werner Friedrich Ohl
- 👤 Rudolf Christian Passavant
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 10:30
CPC Classifications
C; C02; C02F; C02F3/00; C02F3/02; C02F3/12; C02F3/1278; C02F3/1284; C02F3/1236; C02F3/1257; Y; Y02; Y02W; Y02W10/00; Y02W10/10
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB191400729A
Cited
US1247540A
Cited
US1643273A
Cited
US1879135A
Cited
US2009559A
Cited
US2723760A
Cited
US3215276A
Cited
US3330413A
Cited
US3312346A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-03-31 | 1972-09-30 | 1973-04-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-03-31 | 1976-09-30 | 1977-04-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-03-31 | 1980-09-30 | 1981-04-01 | $7700.00 | Window Closed / Lapsed |