Patent US3411447A successfully refreshed from Google Patents.
US3411447A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Repulsion induction pump
Assignee: Kaiser Aluminum and Chemical Corp
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Filing: 1967-04-07
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Granted: 1968-11-19
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Expires: 1987-04-07
Abstract
No abstract record available.
Inventors
- 👤 John D Fox
- 👤 Thomas W F Foster
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 18:45
CPC Classifications
H; H02; H02K; H02K44/00; H02K44/02; H02K44/06
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) | 1971-11-19 | 1972-05-20 | 1972-11-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-11-19 | 1976-05-20 | 1976-11-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-11-19 | 1980-05-20 | 1980-11-19 | $7700.00 | Window Closed / Lapsed |