US3483969A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Material separation using ferromagnetic liquid techniques
Assignee: Avco Corp
•
Filing: 1967-07-05
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Granted: 1969-12-16
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Expires: 1987-07-05
Abstract
No abstract record available.
Inventors
- 👤 Ronald E Rosensweig
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 03:26
CPC Classifications
B; B03; B03C; B03C1/00; B03C1/32; B03B; B03B5/00; B03B5/28; B03B5/30; B03B5/44
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2590756A
Cited
US2902153A
Cited
GB816974A
Cited
US3065640A
Cited
US3133876A
Cited
US3206987A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-12-15 | 1973-06-16 | 1973-12-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-12-15 | 1977-06-16 | 1977-12-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-12-15 | 1981-06-16 | 1981-12-16 | $7700.00 | Window Closed / Lapsed |