US4066539A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Oil-recovering material and process for preparing and using the same
Assignee: Hitachi Ltd
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Filing: 1976-11-23
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Granted: 1978-01-03
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Expires: 1996-11-23
Abstract
Abstract Atactic polypropylene is cooled, disintegrated into granules, mixed with cereal powders such as wheat flour, starch powders, etc. thereby to deposit the cereal powders around the granules, and returned to room temperature thereby to prepare an oil-recovering material. The oil-recovering material is spread onto surfaces of sea water with floating oil or surfaces of land area fouled with oil, such as sand beach, etc. to recover the oil therefrom.
Inventors
- 👤 Takeshi Hachisu
- 👤 Akinari Uchida
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 03:03
CPC Classifications
C; C02; C02F; C02F1/00; C02F1/68; C02F1/681; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2982; Y10T428/2991; Y10T428/2998
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
19 words
An oil-recovering material which comprises atactic polypropylene granules and a cereal powder deposited onto the surface of the granules.
Claim 2
Dependent Claim
19 words
An oil-recovering material which comprises atactic polypropylene granules and a cereal powder deposited onto the surface of the granules.
Claim 3
Dependent Claim
18 words
An oil-recovering material according to claim 1, wherein the cereal powder is wheat flour or a starch powder.
Claim 4
Dependent Claim
36 words
A method for the recovery of oil from water-containing oil or sand-containing oil comprising contacting the water-containing oil or sand-containing oil with the product of claim 1, whereby the oil is absorbed by the oil-recovering product.
Claim 5
Dependent Claim
59 words
A process for preparing an oil-recovering material, which comprises: a. cooling atactic polypropylene to a temperature range of -20° C to -30° C thereby making the polypropylene brittle; b. disintegrating the cooled atactic polypropylene into granules; c. depositing a cereal powder onto the surface of the granules; and d. returning the cereal powder-deposited atactic polypropylene granules to room temperature.
Claim 6
Dependent Claim
59 words
A process for preparing an oil-recovering material, which comprises: a. cooling atactic polypropylene to a temperature range of -20° C to -30° C thereby making the polypropylene brittle; b. disintegrating the cooled atactic polypropylene into granules; c. depositing a cereal powder onto the surface of the granules; and d. returning the cereal powder-deposited atactic polypropylene granules to room temperature.
Claim 7
Dependent Claim
17 words
A process according to claim 3, wherein the cereal powder is wheat flour or a starch powder.
Claim 8
Dependent Claim
9 words
A product according to the process of claim 4.
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) | 1981-01-02 | 1981-07-04 | 1982-01-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-01-02 | 1985-07-04 | 1986-01-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-01-02 | 1989-07-04 | 1990-01-03 | $7700.00 | Window Closed / Lapsed |