US3416176A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Unit for removing solids from tanks, reservoirs and the like
Assignee: Richards of Rockford Inc
•
Filing: 1967-08-09
•
Granted: 1968-12-17
•
Expires: 1987-08-09
Abstract
No abstract record available.
Inventors
- 👤 Richard B Ravitts
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 04:50
CPC Classifications
B; B08; B08B; B08B9/00; B08B9/08; B08B9/093; B08B9/0933
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2646889A
Cited
US3254355A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-12-17 | 1972-06-17 | 1972-12-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-12-17 | 1976-06-17 | 1976-12-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-12-17 | 1980-06-17 | 1980-12-17 | $7700.00 | Window Closed / Lapsed |