US3728208A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Oil absorbent foamed silicate for oil pollution control
Assignee: GAF Corp
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Filing: 1971-02-09
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Granted: 1973-04-17
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Expires: 1991-02-09
Abstract
Abstract A POROUS ALKALI METAL SILICATE FOAM HAVING OLEOPHILICHYDROPHOBICPROPERTIES ISPROVIDED OR USE IN OIL SPILL CONTROL AND REMOVAL. THE SILICATE FOAM IS PREFERABLY FORMED FROM A BLEND COMPRISING SOLID AND LIQUID ALKALI METAL SILICATES AND AN OIL ABSORPTION-WATER REPELLANT AGENT. THE BLEND IS PELLETIZED, HEATED IN AN OVEN TO EXPAND THE MATERIAL INTO FOAM PARTICLES, AND THEN SHREDDED, GRADED AND RETREATED WITH AN OLEOPHILIC-HYDROPHOBIC AGENT TO COAT THE INTERNAL AND EXTERNA SURFACES AND THEREBY FURTHER ENHANCE THE OIL-ABSORPTION CHARACTERISTICS.
Inventors
- 👤 J Whittington
- 👤 J Meyer
- 👤 G Tingle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 10:57
CPC Classifications
E; E02; E02B; E02B15/00; E02B15/04; E02B15/042; C; C02; C02F; C02F1/00; C02F1/68; C02F1/681; Y; Y02; Y02A; Y02A20/00; Y02A20/20; Y02A20/204; Y10; Y10S; Y10S264/00; Y10S264/06; Y10T; Y10T428/00; Y10T428/29; Y10T428/2982; Y10T428/2991; Y10T428/2993; Y10T428/2995
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-04-16 | 1976-10-16 | 1977-04-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-04-16 | 1980-10-16 | 1981-04-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-04-16 | 1984-10-16 | 1985-04-17 | $7700.00 | Window Closed / Lapsed |