US3791990A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Oil absorbent
Assignee: Fischer Holdings Ltd
•
Filing: 1972-01-03
•
Granted: 1974-02-12
•
Expires: 1992-01-03
Abstract
Abstract AN OIL ABSORBENT MATERIAL, SPECIALLY PEAT, HAVING A MOISTURE CONTENT OF LESS THAN TEN PERCENT BY WEIGHT FOR USE PARTICULARLY IN REMOVING OIL FILM FROM WATER.
Inventors
- 👤 K Fischer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 08:12
CPC Classifications
B; B01; B01J; B01J20/00; B01J20/22; B01D; B01D17/00; B01D17/02; B01D17/0202; C; C02; C02F; C02F1/00; C02F1/68; C02F1/681; Y; Y10; Y10S; Y10S210/00; Y10S210/918; Y10S210/922; Y10S210/924
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) | 1977-02-11 | 1977-08-13 | 1978-02-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-02-11 | 1981-08-13 | 1982-02-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-02-11 | 1985-08-13 | 1986-02-12 | $7700.00 | Window Closed / Lapsed |