Patent US3517814A successfully refreshed from Google Patents.
US3517814A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High speed water purifying apparatus
Assignee: Individual
•
Filing: 1968-06-17
•
Granted: 1970-06-30
•
Expires: 1988-06-17
Abstract
No abstract record available.
Inventors
- 👤 Toyomasa Minegishi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 23:33
CPC Classifications
C; C02; C02F; C02F1/00; C02F1/52; C02F1/5281; B; B01; B01D; B01D21/00; B01D21/0018; B01D21/003; B01D21/0039; B01D21/0042; B01D21/02; B01D21/08; B01D21/24; B01D21/2405; B01D21/245; B01D21/2488; B01D21/26
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US3306449A
Cited
US1837191A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-06-29 | 1973-12-29 | 1974-06-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-06-29 | 1977-12-29 | 1978-06-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-06-29 | 1981-12-29 | 1982-06-30 | $7700.00 | Window Closed / Lapsed |