Patent US3396512A successfully refreshed from Google Patents.
US3396512A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for the treatment of liquids
Assignee: Black Sivalls and Bryson Inc
•
Filing: 1966-09-22
•
Granted: 1968-08-13
•
Expires: 1986-09-22
Abstract
No abstract record available.
Inventors
- 👤 Robert E Mcminn
- 👤 Jr Clifford C Dougherty
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 10:02
CPC Classifications
B; B01; B01D; B01D17/00; B01D17/02; B01D17/0208; B01D17/0217; B01D17/04; B01D17/042; B01D17/045
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2681150A
Cited
US2726729A
Cited
US2783854A
Cited
US3040499A
Cited
US3009536A
Cited
US3312044A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-08-13 | 1972-02-12 | 1972-08-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-08-13 | 1976-02-12 | 1976-08-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-08-13 | 1980-02-12 | 1980-08-13 | $7700.00 | Window Closed / Lapsed |