US4042495A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for conditioning fresh and sea waters from oil
Assignee: Anic SpA
•
Filing: 1975-11-10
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Granted: 1977-08-16
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Expires: 1995-11-10
Abstract
Abstract Oily hydrocarbons which pollute the surface of water are removed therefrom by scattering over the polluted surface solid particles of nutrient salt containing nitrogen and phosphorous in a form that is readily assimilable by aqueous microorganisms capable of metabolizing hydrocarbons. The particles of nutrient salt are given a surface pretreatment with paraffine so that they are buoyant and only slowly soluble in water and lipophilic.
Inventors
- 👤 Walter Marconi
- 👤 Nicola Oddo
- 👤 Ludwig Degen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 23:14
CPC Classifications
C; C02; C02F; C02F1/00; C02F1/68; C02F1/681; B; B01; B01D; B01D17/00; B01D17/02; B01D17/04; B01D17/047; C02F3/00; C02F3/34; C02F3/344; Y; Y10; Y10S; Y10S210/00; Y10S210/918; Y10S210/922
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
93 words
The method of removing oily hydrocarbons from the surface of water which is polluted thereby and which contains aqueous microorganisms capable of metabolizing said oily hydrocarbons, which comprises dispersing over said polluted surface particles comprised of one or more solid nutrient salts selected from the group consisting of ammonium salts, ammonium nitrates, urea, sodium phosphates, potassium phosphates, ammonium phosphates, superphosphate, magnesium ammonium phosphate, and mixtures thereof, said particles having a surface coating of paraffin sufficient to cause the salts to be slowly soluble and to render the particles buoyant in water and lipophilic.
Claim 2
Independent Claim
93 words
The method of removing oily hydrocarbons from the surface of water which is polluted thereby and which contains aqueous microorganisms capable of metabolizing said oily hydrocarbons, which comprises dispersing over said polluted surface particles comprised of one or more solid nutrient salts selected from the group consisting of ammonium salts, ammonium nitrates, urea, sodium phosphates, potassium phosphates, ammonium phosphates, superphosphate, magnesium ammonium phosphate, and mixtures thereof, said particles having a surface coating of paraffin sufficient to cause the salts to be slowly soluble and to render the particles buoyant in water and lipophilic.
Claim 3
Dependent Claim
28 words
A method of claim 1 wherein the nutrient salts are absorbed by an inert carrier selected from the group consisting of pumice-stone, vermiculite, perlofin, agriperlite, silicates and alumina.
Claim 4
Dependent Claim
13 words
A method of claim 1 wherein the nutrient salt is magnesium ammonium phosphate.
References Cited (Backward Citations)
US3205061A
Cited
US3843517A
Cited
US3728279A
Cited
US3607741A
Cited
US3769164A
Cited
US3959127A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-08-15 | 1981-02-14 | 1981-08-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-08-15 | 1985-02-14 | 1985-08-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-08-15 | 1989-02-14 | 1989-08-16 | $7700.00 | Window Closed / Lapsed |