US2414451A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluid control system
Assignee: Individual
•
Filing: 1943-07-27
•
Granted: 1947-01-21
•
Expires: 1963-07-27
Abstract
No abstract record available.
Inventors
- 👤 Niels A Christensen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 08:09
CPC Classifications
B; B64; B64D; B64D37/00; B64D37/005; Y; Y10; Y10S; Y10S251/00; Y10S251/90; Y10T; Y10T137/00; Y10T137/4673; Y10T137/8593; Y10T137/86493; Y10T137/86501; Y10T137/86509; Y10T137/86574; Y10T137/8667; Y10T137/86694; Y10T137/8671; Y10T137/87249; Y10T137/877; Y10T137/87708; Y10T137/8778; Y10T137/87917
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-01-20 | 1950-07-22 | 1951-01-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-01-20 | 1954-07-22 | 1955-01-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-01-20 | 1958-07-22 | 1959-01-21 | $7700.00 | Window Closed / Lapsed |