Patent US2344304A successfully refreshed from Google Patents.
US2344304A
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US
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Vent pipe valve for fuel oil tanks
Assignee: Individual
•
Filing: 1942-12-30
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Granted: 1944-03-14
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Expires: 1962-12-30
Abstract
No abstract record available.
Inventors
- 👤 Frank B Hooper
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 20:58
CPC Classifications
F; F16; F16K; F16K24/00; F16K24/04; F16K24/042; F16K24/044; F16K24/046; Y; Y10; Y10S; Y10S137/00; Y10S137/901; Y10S55/00; Y10S55/19; Y10T; Y10T137/00; Y10T137/7287; Y10T137/7293; Y10T137/7297; Y10T137/73; Y10T137/7358; Y10T137/7423; Y10T137/7426; Y10T137/7436
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) | 1947-03-14 | 1947-09-13 | 1948-03-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1951-03-14 | 1951-09-13 | 1952-03-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1955-03-14 | 1955-09-13 | 1956-03-14 | $7700.00 | Window Closed / Lapsed |