US2992986A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Treatment of sewage and other waste material
Assignee: Pacific Flush Tank Co
•
Filing: 1955-09-22
•
Granted: 1961-07-18
•
Expires: 1975-09-22
Abstract
No abstract record available.
Inventors
- 👤 William T Ingram
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 04:58
CPC Classifications
C; C02; C02F; C02F3/00; C02F3/02; C02F3/04; Y; Y02; Y02W; Y02W10/00; Y02W10/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
104 words
THE METHOD OF BIOLOGICALLY TREATING ESSENTIALLY LIQUID WASTE MATERIAL WHICH COMPRISES CONTINOUSLY FEEDING THE WASTE MATERIAL TO BE TREATED ONTO A FIRST SECTION OF A SINGLE TRICKLING FILTER HAVING SUPERIMPOSED SECTIONS SPACED FROM ONE ANOTHER, ALLOWING SAID MATERIAL TO PASS DOWNWARDLY THROUGH SAID SECTION, ALLOWING THE EFFLUENT FROM SAID FIRST SECTION TO FALL FREELY DOWNWARDLY BY GRAVITY FROM SAID SECTION ONTO THE NEXT SUCCEEDING FILTER SECTION, ALLOWING SAID EFFLUENT TO PASS DOWNWARDLY THROUGH SAID NEXT SUCCEEDING FILTER SECTION, CONTINUOUSLY INTRODUCING AIR UNDER PRESSURE SIMULTANEOUSLY UNDER EACH OF SAID SECTIONS AND PASSING ALL OF THE AIR FROM EACH SECTION UPWARDLY THROUGH THE NEXT PRECEDING SECTION.
Claim 2
Independent Claim
104 words
THE METHOD OF BIOLOGICALLY TREATING ESSENTIALLY LIQUID WASTE MATERIAL WHICH COMPRISES CONTINOUSLY FEEDING THE WASTE MATERIAL TO BE TREATED ONTO A FIRST SECTION OF A SINGLE TRICKLING FILTER HAVING SUPERIMPOSED SECTIONS SPACED FROM ONE ANOTHER, ALLOWING SAID MATERIAL TO PASS DOWNWARDLY THROUGH SAID SECTION, ALLOWING THE EFFLUENT FROM SAID FIRST SECTION TO FALL FREELY DOWNWARDLY BY GRAVITY FROM SAID SECTION ONTO THE NEXT SUCCEEDING FILTER SECTION, ALLOWING SAID EFFLUENT TO PASS DOWNWARDLY THROUGH SAID NEXT SUCCEEDING FILTER SECTION, CONTINUOUSLY INTRODUCING AIR UNDER PRESSURE SIMULTANEOUSLY UNDER EACH OF SAID SECTIONS AND PASSING ALL OF THE AIR FROM EACH SECTION UPWARDLY THROUGH THE NEXT PRECEDING SECTION.
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Cited
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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) | 1964-07-17 | 1965-01-16 | 1965-07-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-07-17 | 1969-01-16 | 1969-07-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-07-17 | 1973-01-16 | 1973-07-18 | $7700.00 | Window Closed / Lapsed |