Patent JPS504136A successfully refreshed from Google Patents.
Patent US335902A successfully refreshed from Google Patents.
US3606984A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Aeration
Assignee: Simon Carves Ltd
•
Filing: 1968-05-09
•
Granted: 1971-09-21
•
Expires: 1988-05-09
Abstract
Abstract SURFACE AERATION APPARATUS FOR TREATING EFFLUENT LIQUID IN WHICH BAFFLE PLATES ARE MOUNTED BELOW A ROTATABLE SURFACE AERATOR AND ARE ARRANGED TO OPPOSED ANY TENDENCY FOR THE EFFLUENT LIQUID TO BE ROTATED AS A BODY WITH THE AERATOR.
Inventors
- 👤 William Swan Robertson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 08:45
CPC Classifications
C; C02; C02F; C02F3/00; C02F3/02; C02F3/12; C02F3/14; C02F3/16; B; B01; B01F; B01F23/00; B01F23/20; B01F23/23; B01F23/234; B01F23/2342; B01F23/23421; Y; Y02; Y02W; Y02W10/00; Y02W10/10
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-09-20 | 1975-03-22 | 1975-09-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-20 | 1979-03-22 | 1979-09-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-20 | 1983-03-22 | 1983-09-21 | $7700.00 | Window Closed / Lapsed |