Patent US3033372A successfully refreshed from Google Patents.
US3033372A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for circulating large bodies of liquid
Assignee: Individual
•
Filing: 1957-08-15
•
Granted: 1962-05-08
•
Expires: 1977-08-15
Abstract
No abstract record available.
Inventors
- 👤 Thomas M Riddick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 12:23
CPC Classifications
E; E02; E02B; E02B1/00; E02B1/003; B; B01; B01F; B01F23/00; B01F23/20; B01F23/23; B01F23/231; B01F23/23105; B01F23/2311; B01F23/23115; B01F23/231153; B01F23/2312; B01F23/23126; B01F23/231265; B01F23/23112; B01F23/231121; B01F23/23123; B01F23/231231; B01F33/00; B01F33/50; B01F33/503; Y; Y10; Y10T; Y10T137/00; Y10T137/402
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US285591A
Cited
US302326A
Cited
US2532457A
Cited
US1813827A
Cited
US2024345A
Cited
US2144385A
Cited
US2330508A
Cited
US2370356A
Cited
US2411390A
Cited
US2770365A
Cited
US2825541A
Cited
US2822329A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-05-07 | 1965-11-06 | 1966-05-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-05-07 | 1969-11-06 | 1970-05-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-05-07 | 1973-11-06 | 1974-05-08 | $7700.00 | Window Closed / Lapsed |