US3380474A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flap valve device
Assignee: INTERNATIONAL CONTROLS CORP
•
Filing: 1965-08-05
•
Granted: 1968-04-30
•
Expires: 1985-08-05
Abstract
No abstract record available.
Inventors
- 👤 Wallace R Mills
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 04:59
CPC Classifications
F; F16; F16K; F16K15/00; F16K15/14; F16K15/144; F16K15/16; F16K15/161; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7837; Y10T137/7869; Y10T137/7875
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US530442A
Cited
GB179713A
Cited
FR987301A
Cited
DE1000199B
Cited
US2928414A
Cited
GB990176A
Cited
US3115155A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-04-30 | 1971-10-30 | 1972-04-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-04-30 | 1975-10-30 | 1976-04-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-04-30 | 1979-10-30 | 1980-04-30 | $7700.00 | Window Closed / Lapsed |