Patent US3768200A successfully refreshed from Google Patents.
US3768200A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for the production of algae including a filtering medium
Assignee: Research Corp
•
Filing: 1971-07-16
•
Granted: 1973-10-30
•
Expires: 1991-07-16
Abstract
Abstract Waste-containing liquor is biochemically treated in a tank or cell by continuously circulating it through a filter media containing quantities of aerobic and facultative bacteria, after a quantity of the waste material is removed, the remaining liquor is directed to and circulated in a algal growth tank. Minerals such as nitrates and phosphates present in the waste liquor serve as nutrients for the growing, filamentous algae; carbon dioxide is optionally recovered from the aerobic bacterial metabolism chamber and introduced into the algal growth tank. The filter tanks and the algal growth tanks may be independently arranged for serial or parallel flow of liquor.
Inventors
- 👤 J Klock
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 22:26
CPC Classifications
C; C02; C02F; C02F3/00; C02F3/32; A; A01; A01G; A01G33/00; Y; Y02; Y02A; Y02A40/00; Y02A40/80; Y02P; Y02P60/00; Y02P60/20; Y02W; Y02W10/00; Y02W10/30; Y02W10/37; Y10; Y10S; Y10S210/00; Y10S210/902; Y10S210/903; Y10S210/906
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
22 words
Apparatus as defined in claim 1 wherein the filtering medium in said first vessel-second chamber is substantially submerged in said waste liquor.
Claim 2
Dependent Claim
61 words
Apparatus as defined in claim 2 and further including: a plurality of said bacteriaL growth vessels operatively associated with said second vessel; means for serial circulation of said liquor from one of said bacterial growth vessels to the next of said bacterial growth vessels; and outlet means operatively connecting the last of said bacterial growth vessels with said algal growth vessel.
Claim 3
Dependent Claim
33 words
Apparatus as defined in claim 3 further including a plurality of said algal growth vessels having means operably associated therewith for the parallel flow of said at least partially treated waste liquor therethrough.
Claim 4
Dependent Claim
43 words
Apparatus as defined in claim 4 further including: means for collection of carbon dioxide gas operably connected to at least one of said bacterial growth vessels, and means for introducing said carbon dioxide gas thus collected into each of said algal growth vessels.
References Cited (Backward Citations)
US1991896A
Cited
US2867945A
Cited
US3155609A
Cited
US3261779A
Cited
US3390076A
Cited
US3468057A
Cited
US3385786A
Cited
US3521400A
Cited
US3598726A
Cited
US3577678A
Cited
US3623976A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-10-29 | 1977-04-30 | 1977-10-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-29 | 1981-04-30 | 1981-10-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-29 | 1985-04-30 | 1985-10-30 | $7700.00 | Window Closed / Lapsed |