US3006596A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flapper valve
Assignee: FLO CONTROL Co
•
Filing: 1959-07-24
•
Granted: 1961-10-31
•
Expires: 1979-07-24
Abstract
No abstract record available.
Inventors
- 👤 Nelson Norman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 16:08
CPC Classifications
F; F16; F16K; F16K31/00; F16K31/12; F16K31/36; F16K31/363; F16K1/00; F16K1/16; F16K1/18; F16K1/20; F16K1/2007; Y; Y10; Y10T; Y10T137/00; Y10T137/5109; Y10T137/5196
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) | 1964-10-30 | 1965-05-01 | 1965-10-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-10-30 | 1969-05-01 | 1969-10-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-10-30 | 1973-05-01 | 1973-10-31 | $7700.00 | Window Closed / Lapsed |