US3485254A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flow control apparatus for fluent magnetic materials
Assignee: Individual
•
Filing: 1968-05-07
•
Granted: 1969-12-23
•
Expires: 1988-05-07
Abstract
No abstract record available.
Inventors
- 👤 Hans Ernst
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 06:30
CPC Classifications
G; G05; G05D; G05D7/00; G05D7/06; G05D7/0617; G05D7/0629; G05D7/0635; G01; G01F; G01F1/00; G01F1/56; G01F1/58; G01F1/582; Y; Y10; Y10T; Y10T137/00; Y10T137/206; Y10T137/2082; Y10T137/218; Y10T137/2191; Y10T137/4456; Y10T137/4643
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2820471A
Cited
US3405728A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-12-22 | 1973-06-23 | 1973-12-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-12-22 | 1977-06-23 | 1977-12-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-12-22 | 1981-06-23 | 1981-12-23 | $7700.00 | Window Closed / Lapsed |