US3443589A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gravity valve
Assignee: Dole Valve Co
•
Filing: 1966-09-16
•
Granted: 1969-05-13
•
Expires: 1986-09-16
Abstract
No abstract record available.
Inventors
- 👤 Nello L Benedetti
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 15:44
CPC Classifications
F; F16; F16K; F16K21/00; F16K21/04; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7837; Y10T137/7879; Y10T137/8593; Y10T137/87571; Y10T137/87652; Y10T137/8766; Y10T137/87668; Y10T137/87676; Y10T137/87684; Y10T137/87692
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2021731A
Cited
US2118300A
Cited
US2875804A
Cited
US2921605A
Cited
US3058431A
Cited
US3082789A
Cited
US3167090A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-05-12 | 1972-11-11 | 1973-05-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-05-12 | 1976-11-11 | 1977-05-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-05-12 | 1980-11-11 | 1981-05-13 | $7700.00 | Window Closed / Lapsed |