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Patent US4439324A successfully refreshed from Google Patents.
US4439324A
Expired / Lapsed
US
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Removal of oil from water
Assignee: Individual
•
Filing: 1982-06-18
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Granted: 1984-03-27
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Expires: 2002-06-18
Abstract
Abstract Bags loosely containing feathers are distributed onto oil on water to enable the feathers to take up the oil. The bags have openings sufficiently large to permit the oil to enter and contact the feathers within the bags. The bags can be linked together, for example in a chain using ropes. Once the feathers have become saturated with oil the bags can be picked up from the water.
Inventors
- 👤 Alfred F. Crotti
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 11:42
CPC Classifications
C; C02; C02F; C02F1/00; C02F1/68; C02F1/681; B; B01; B01D; B01D17/00; B01D17/02; B01D17/0202; E; E02; E02B; E02B15/00; E02B15/04; E02B15/041; Y; Y02; Y02A; Y02A20/00; Y02A20/20; Y02A20/204; Y10; Y10S; Y10S210/00; Y10S210/918; Y10S210/922; Y10S210/924
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
66 words
A method of removing oil from water, which method comprises the steps of applying to water to be treated at least one bag loosely containing washed and dried chicken or turkey feathers, the or each bag having means defining openings sufficiently large to permit oil to contact the feathers yet sufficiently small to retain feathers within the bag, and allowing feathers to take up the oil.
Claim 2
Independent Claim
66 words
A method of removing oil from water, which method comprises the steps of applying to water to be treated at least one bag loosely containing washed and dried chicken or turkey feathers, the or each bag having means defining openings sufficiently large to permit oil to contact the feathers yet sufficiently small to retain feathers within the bag, and allowing feathers to take up the oil.
Claim 3
Dependent Claim
24 words
A method according to claim 1 which further comprises the step of picking up the or each bag of oil-laden feathers from the water.
Claim 4
Dependent Claim
16 words
A method according to claim 1 wherein the or each bag is made of mesh material.
Claim 5
Dependent Claim
46 words
A method according to claim 1 wherein from one third to three quarters of the volume of the or each bag is occupied by feathers in their normal uncompressed state when the bag is held at one end and the feathers have settled within the bag.
Claim 6
Dependent Claim
30 words
A method according to claim 1 wherein the or each bag is selected from the group consisting of a bag with a rectangular "tea bag" configuration and a sausage-shaped bag.
Claim 7
Dependent Claim
16 words
A method according to claim 1 wherein individual bags are applied to water to be treated.
Claim 8
Dependent Claim
20 words
A method according to claim 1 wherein two or more bags linked together are applied to water to be treated.
Claim 9
Dependent Claim
14 words
A method according to claim 7 wherein the bags are linked in a chain.
References Cited (Backward Citations)
US1201554A
Cited
US3739913A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-03-27 | 1987-09-26 | 1988-03-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-03-27 | 1991-09-26 | 1992-03-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-03-27 | 1995-09-26 | 1996-03-27 | $7700.00 | Window Closed / Lapsed |