US3534861A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Settling tanks
Assignee: CITY OF DETROIT
•
Filing: 1969-10-17
•
Granted: 1970-10-20
•
Expires: 1989-10-17
Abstract
No abstract record available.
Inventors
- 👤 George E Hubbell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 09:51
CPC Classifications
B; B01; B01D; B01D21/00; B01D21/10; B01D21/12; B01D21/14; B01D21/24; B01D21/2405; B01D21/2416; B01D21/2427; B01D21/2433; B01D21/245
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2702124A
Cited
US2961100A
Cited
US3136724A
Cited
US3228530A
Cited
US3221889A
Cited
US3395800A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-10-19 | 1974-04-20 | 1974-10-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-10-19 | 1978-04-20 | 1978-10-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-10-19 | 1982-04-20 | 1982-10-20 | $7700.00 | Window Closed / Lapsed |