US3487939A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for separating ferromagnetic material from a liquid
Assignee: US Philips Corp
•
Filing: 1967-11-14
•
Granted: 1970-01-06
•
Expires: 1987-11-14
Abstract
No abstract record available.
Inventors
- 👤 Phillip Alban Keeley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 22:43
CPC Classifications
B; B03; B03C; B03C1/00; B03C1/02; B03C1/04; B03C1/16
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2854137A
Cited
US3357559A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-01-05 | 1973-07-07 | 1974-01-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-01-05 | 1977-07-07 | 1978-01-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-01-05 | 1981-07-07 | 1982-01-06 | $7700.00 | Window Closed / Lapsed |