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
2026-10-27 10:42
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
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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 |