US3339901A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Aeration equipment with easy-raising facilities
Assignee: Chicago Bridge and Iron Co
•
Filing: 1963-03-29
•
Granted: 1967-09-05
•
Expires: 1983-03-29
Abstract
No abstract record available.
Inventors
- 👤 Walker James Donald
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 01:50
CPC Classifications
C; C02; C02F; C02F3/00; C02F3/02; C02F3/12; C02F3/20; C02F3/203; Y; Y02; Y02W; Y02W10/00; Y02W10/10; Y10; Y10S; Y10S261/00; Y10S261/47
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
168 words
APPARATUS FOR USE IN CONNECTION WITH A SEWAGE TREATMENT PLANT HAVING A TREATMENT TANK AND AN AIR SUPPLY LINE, SAID APPARATUS INCLUDING: AIR DIFFUSER MEANS IN SAID TANK AD HAVING A RIGID AIR RISER PIPE EXTENDING UPWARDLY FROM DEEP IN THE TANK TO THE SIDE OF THE TANK ABOVE THE SURFACE OF THE LIQUID IN THE TANK, A FIRST LIFT CONNECTION ON SAID PIPE ABOVE THE LIQUID SURFACE, AND A SECOND LIFT CONNECTION ON THE PIPE A SUBSTANTIAL DISTANCE BELOW THE FIRST CONNECTION; A QUICK-RELEASE COUPLING BETWEEN THE RIGID PIPE AND LINE FOR THE SUPPLY OF AIR TO THE DIFFUSER MEANS; AND A LIFT APPARATUS ADAPTED TO BE POSITIONED WITH A WORKING FACE EXPOSED TO, AND AT THE SIDE OF, THE TANK ADJACENT SAID DIFFUSER MEANS AND INCLUDING TWO CLOSELY ASSOCIATED LIFT DEVICES EACH CAPABLE OF A LIFTING MOVEMENT OF LESS THAN THE VERTICAL DIMENSION OF THE PIPE, EACH DEVICE HAVING CONNECTING MEANS; WHEREBY SAID DIFFUSER MEANS MAY BE QUICKLY AND EASILY REMOVED FORM SAID TANK BY RE-
Claim 2
Dependent Claim
168 words
APPARATUS FOR USE IN CONNECTION WITH A SEWAGE TREATMENT PLANT HAVING A TREATMENT TANK AND AN AIR SUPPLY LINE, SAID APPARATUS INCLUDING: AIR DIFFUSER MEANS IN SAID TANK AD HAVING A RIGID AIR RISER PIPE EXTENDING UPWARDLY FROM DEEP IN THE TANK TO THE SIDE OF THE TANK ABOVE THE SURFACE OF THE LIQUID IN THE TANK, A FIRST LIFT CONNECTION ON SAID PIPE ABOVE THE LIQUID SURFACE, AND A SECOND LIFT CONNECTION ON THE PIPE A SUBSTANTIAL DISTANCE BELOW THE FIRST CONNECTION; A QUICK-RELEASE COUPLING BETWEEN THE RIGID PIPE AND LINE FOR THE SUPPLY OF AIR TO THE DIFFUSER MEANS; AND A LIFT APPARATUS ADAPTED TO BE POSITIONED WITH A WORKING FACE EXPOSED TO, AND AT THE SIDE OF, THE TANK ADJACENT SAID DIFFUSER MEANS AND INCLUDING TWO CLOSELY ASSOCIATED LIFT DEVICES EACH CAPABLE OF A LIFTING MOVEMENT OF LESS THAN THE VERTICAL DIMENSION OF THE PIPE, EACH DEVICE HAVING CONNECTING MEANS; WHEREBY SAID DIFFUSER MEANS MAY BE QUICKLY AND EASILY REMOVED FORM SAID TANK BY RE-
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-09-04 | 1971-03-06 | 1971-09-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-09-04 | 1975-03-06 | 1975-09-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-09-04 | 1979-03-06 | 1979-09-05 | $7700.00 | Window Closed / Lapsed |