US2804281A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Float valve
Assignee: Individual
•
Filing: 1954-02-02
•
Granted: 1957-08-27
•
Expires: 1974-02-02
Abstract
No abstract record available.
Inventors
- 👤 Henry G Osburn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:58
CPC Classifications
E; E21; E21B; E21B21/00; E21B21/10; Y; Y10; Y10T; Y10T137/00; Y10T137/7504; Y10T137/7722; Y10T137/7837; Y10T137/7904; Y10T137/7922; Y10T137/7929; Y10T137/7932; Y10T137/7933; Y10T137/8158
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1505850A
Cited
US1890223A
Cited
US1919510A
Cited
US2109853A
Cited
US2154162A
Cited
US2219512A
Cited
US2651199A
Cited
US2656151A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-08-26 | 1961-02-25 | 1961-08-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-08-26 | 1965-02-25 | 1965-08-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-08-26 | 1969-02-25 | 1969-08-27 | $7700.00 | Window Closed / Lapsed |