US3640387A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Removal of floc from settling device
Assignee: Neptune Microfloc Inc
•
Filing: 1969-12-15
•
Granted: 1972-02-08
•
Expires: 1989-12-15
Abstract
Abstract Floc buildup on top edges of inclined tube settling device prevented by causing slight flow of liquid across tops of tubes.
Inventors
- 👤 Walter R Conley
- 👤 Gordon L Culp
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 21:17
CPC Classifications
B; B01; B01D; B01D21/00; B01D21/0012; B01D21/0006; B01D21/0039; B01D21/0051; B01D21/02; B01D21/24; B01D21/2444
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
13 words
The method of claim 1 wherein said current of backwash water is continuous.
Claim 2
Dependent Claim
13 words
The method of claim 1 wherein said current of backwash water is intermittent.
Claim 3
Dependent Claim
31 words
The method of claim 1 wherein said current of backwash water is caused to move across said tops of said tubes at a velocity in excess of one-half foot per second.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-02-07 | 1975-08-09 | 1976-02-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-02-07 | 1979-08-09 | 1980-02-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-02-07 | 1983-08-09 | 1984-02-08 | $7700.00 | Window Closed / Lapsed |