US3052527A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for removing dissolved oxygen from water
Assignee: AO Smith Corp
•
Filing: 1957-05-03
•
Granted: 1962-09-04
•
Expires: 1977-05-03
Abstract
No abstract record available.
Inventors
- 👤 Orrin E Andrus
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 07:44
CPC Classifications
B; B01; B01D; B01D19/00; B01D19/0031; C; C02; C02F; C02F1/00; C02F1/20
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1725925A
Cited
US1731409A
Cited
US2127450A
Cited
US2365221A
Cited
US2690379A
Cited
FR1001725A
Cited
US2527659A
Cited
US2515609A
Cited
US2583110A
Cited
GB690740A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-09-03 | 1966-03-05 | 1966-09-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-09-03 | 1970-03-05 | 1970-09-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-09-03 | 1974-03-05 | 1974-09-04 | $7700.00 | Window Closed / Lapsed |