US2247930A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vacuum radiator air vent valve
Assignee: Individual
•
Filing: 1940-02-17
•
Granted: 1941-07-01
•
Expires: 1960-02-17
Abstract
No abstract record available.
Inventors
- 👤 Robert E Turner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 23:00
CPC Classifications
F; F16; F16K; F16K24/00; F16K24/04; F16K24/042; F16K24/044; F24; F24D; F24D19/00; F24D19/08; F24D19/081; Y; Y10; Y10T; Y10T137/00; Y10T137/2931; Y10T137/3003; Y10T137/3084; Y10T137/3087; Y10T137/309; Y10T137/3099; Y10T137/7722; Y10T137/7837; Y10T137/7879; Y10T137/7888; Y10T137/789; Y10T137/7904; Y10T137/7908; Y10T137/7909; Y10T137/7913; Y10T137/7915; Y10T137/7917
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) | 1944-06-30 | 1944-12-30 | 1945-07-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1948-06-30 | 1948-12-30 | 1949-07-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1952-06-30 | 1952-12-30 | 1953-07-01 | $7700.00 | Window Closed / Lapsed |