US4026792A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Filter system and method of filtering animal processing wastes
Assignee: Individual
•
Filing: 1975-01-24
•
Granted: 1977-05-31
•
Expires: 1995-01-24
Abstract
Abstract Alternate hydrophilic and hydrophobic fiber filters are used to remove particulate matter and oil from aqueous animal processing wastes, such as those from cannery operations, poultry processing plants and packing plants. The fiber used to make the filters is preferably a low-lignin content, cellulosic fiber that is digestible by ruminating animals. The adsorbed oil in the hydrophobic filter may be removed and the filter reused. The hydrophilic fiber filter containing particulate matter may be dewatered and converted to animal feed or fertilizer.
Inventors
- 👤 George Otto Orth, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:58
CPC Classifications
B; B01; B01D; B01D17/00; B01D17/02; B01D17/0202; B01D17/08; B01D17/10; Y; Y10; Y10S; Y10S210/00; Y10S210/918; Y10S210/922
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
127 words
A method of treating waste water containing particulate matter, liquid oils and fats to remove the same, comprising: passing the waste water stream through a hydrophilic fiber filter composed of a form-retaining cellulosic fiber mat having a density ranging from 0.2 to 15 lb. per cu. ft. for removal of the particulate matter contained in the aqueous waste water streams, and immediately passing the water emerging from the hydrophilic fiber filter through a hydrophobic fiber filter composed of a form-retaining cellulosic fiber mat having a density ranging from 0.2 to 15 lb. per cu. ft. whose fibers are treated with a material rendering them oil adsorbent and substantially nonwettable by water, the hydrophobic fiber filter adsorbing the liquid oils and fats from the water stream passing therethrough.
Claim 2
Independent Claim
127 words
A method of treating waste water containing particulate matter, liquid oils and fats to remove the same, comprising: passing the waste water stream through a hydrophilic fiber filter composed of a form-retaining cellulosic fiber mat having a density ranging from 0.2 to 15 lb. per cu. ft. for removal of the particulate matter contained in the aqueous waste water streams, and immediately passing the water emerging from the hydrophilic fiber filter through a hydrophobic fiber filter composed of a form-retaining cellulosic fiber mat having a density ranging from 0.2 to 15 lb. per cu. ft. whose fibers are treated with a material rendering them oil adsorbent and substantially nonwettable by water, the hydrophobic fiber filter adsorbing the liquid oils and fats from the water stream passing therethrough.
Claim 3
Dependent Claim
30 words
The method of claim 1 wherein the cellulosic fiber making up the hydrophilic filter is nontoxic and palatable to ruminating animals and is convertible into animal feed for ruminating animals.
References Cited (Backward Citations)
US1230099A
Cited
US2065658A
Cited
US2739713A
Cited
US3327859A
Cited
US3697419A
Cited
US3494863A
Cited
US3689406A
Cited
US3707464A
Cited
US3836681A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-05-30 | 1980-11-29 | 1981-05-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-05-30 | 1984-11-29 | 1985-05-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-05-30 | 1988-11-29 | 1989-05-31 | $7700.00 | Window Closed / Lapsed |