Patent US2691386A successfully refreshed from Google Patents.
US2691386A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluid level safety control valve
Assignee: JUNE L MADISON
•
Filing: 1951-04-06
•
Granted: 1954-10-12
•
Expires: 1971-04-06
Abstract
No abstract record available.
Inventors
- 👤 Earle H Madison
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 21:56
CPC Classifications
F; F16; F16K; F16K31/00; F16K31/12; F16K31/18; F16K31/20; F16K31/22; Y; Y10; Y10T; Y10T137/00; Y10T137/7287; Y10T137/7329; Y10T137/7358; Y10T137/7381; Y10T137/7423; Y10T137/7426; Y10T137/7436
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1611398A
Cited
US1803879A
Cited
US1745762A
Cited
DE589617C
Cited
US2208181A
Cited
US2226287A
Cited
US2231158A
Cited
US2353740A
Cited
US2371511A
Cited
US2387858A
Cited
US2494395A
Cited
US2557634A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-10-11 | 1958-04-12 | 1958-10-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-10-11 | 1962-04-12 | 1962-10-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-10-11 | 1966-04-12 | 1966-10-12 | $7700.00 | Window Closed / Lapsed |