US2830705A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetic trap
Assignee: Eriez Manufacturing Co
•
Filing: 1954-08-09
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Granted: 1958-04-15
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Expires: 1974-08-09
Abstract
No abstract record available.
Inventors
- 👤 Conrad A Johannesen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 14:46
CPC Classifications
F; F16; F16L; F16L55/00; F16L55/24; B; B03; B03C; B03C1/00; B03C1/02; B03C1/025; B03C1/031; B03C1/033; B03C1/0332; B03C1/28; B03C1/288; B03C2201/00; B03C2201/18; B03C2201/28
Claims Analysis
Total Claims: 0
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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) | 1961-04-14 | 1961-10-14 | 1962-04-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-04-14 | 1965-10-14 | 1966-04-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-04-14 | 1969-10-14 | 1970-04-15 | $7700.00 | Window Closed / Lapsed |