US2590244A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Valve cage
Assignee: Individual
•
Filing: 1948-02-21
•
Granted: 1952-03-25
•
Expires: 1968-02-21
Abstract
No abstract record available.
Inventors
- 👤 Dixon T Harbison
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 04:39
CPC Classifications
E; E21; E21B; E21B43/00; E21B43/12; F; F16; F16K; F16K15/00; F16K15/02; F16K15/04; F16K15/042; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7837; Y10T137/7854; Y10T137/7857; Y10T137/7904; Y10T137/7908; Y10T137/7909; Y10T137/791
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) | 1955-03-25 | 1955-09-24 | 1956-03-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-03-25 | 1959-09-24 | 1960-03-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-03-25 | 1963-09-24 | 1964-03-25 | $7700.00 | Window Closed / Lapsed |