US3771653A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Compost for removing oil films from water
Assignee: International Minerals and Chemical Corp
•
Filing: 1970-11-17
•
Granted: 1973-11-13
•
Expires: 1990-11-17
Abstract
Abstract An oil film is removed from the surface of water by contacting the same with compost prepared by the bacterial digestion of organic waste material.
Inventors
- 👤 J Harnett
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 16:12
CPC Classifications
C; C02; C02F; C02F1/00; C02F1/68; C02F1/681; B; B01; B01D; B01D17/00; B01D17/02; B01D17/0202; B01J; B01J20/00; B01J20/22
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
18 words
The method in accordance with claim 1 wherein the compost is prepared from organic material by aerobic digestion.
Claim 2
Dependent Claim
59 words
The method in accordance with claim 2 wherein compost is added to ballast water in a compartment in an oil tanker which also contains a mineral oil, whereby said compost absorbs said mineral oil, and the contents of said compartment are pumped through a screen to discharge said water and leave said compost with absorbed oil in said compartment.
Claim 3
Dependent Claim
21 words
The method in accordance with claim 2 wherein the oil is present as a film on the surface of the water.
Claim 4
Dependent Claim
28 words
The method in accordance with claim 4 wherein compost containing absorbed oil is removed from the surface of the water, and absorbed oil is recovered from the compost.
Claim 5
Dependent Claim
14 words
The method in accordance with claim 2 wherein the oil is a hydrocarbon liquid.
Claim 6
Dependent Claim
13 words
The method in accordance with claim 6 wherein the oil is mineral oil.
Claim 7
Dependent Claim
13 words
The method in accordance with claim 7 wherein the water is sea water.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-11-12 | 1977-05-14 | 1977-11-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-11-12 | 1981-05-14 | 1981-11-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-11-12 | 1985-05-14 | 1985-11-13 | $7700.00 | Window Closed / Lapsed |