US3512649A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ultra-rate water filtration apparatus
Assignee: ALBERT S TOTH
•
Filing: 1966-03-15
•
Granted: 1970-05-19
•
Expires: 1986-03-15
Abstract
No abstract record available.
Inventors
- 👤 Rostislav Nebolsine
- 👤 Albert S Toth
- 👤 Rudolph J Sanday
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 22:55
CPC Classifications
B; B01; B01D; B01D24/00; B01D24/02; B01D24/20; B01D24/24; B01D24/46; B01D24/4631; B01D24/4636
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US647780A
Cited
US1572398A
Cited
US1698079A
Cited
US1871122A
Cited
GB500378A
Cited
US2559784A
Cited
US2559936A
Cited
US3134735A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-05-18 | 1973-11-17 | 1974-05-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-05-18 | 1977-11-17 | 1978-05-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-05-18 | 1981-11-17 | 1982-05-19 | $7700.00 | Window Closed / Lapsed |