Patent US3441249A successfully refreshed from Google Patents.
US3441249A
Expired / Lapsed
US
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Flow control valve
Assignee: ALKON PRODUCTS CORP
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Filing: 1965-11-30
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Granted: 1969-04-29
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Expires: 1985-11-30
Abstract
No abstract record available.
Inventors
- 👤 Wilfred Aslan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 06:54
CPC Classifications
F; F16; F16K; F16K47/00; F16K47/08; F16K47/10; Y; Y10; Y10T; Y10T137/00; Y10T137/8158; Y10T137/8225; Y10T137/8275; Y10T137/8593; Y10T137/87265; Y10T137/87298; Y10T137/87515; Y10T137/87539
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) | 1972-04-28 | 1972-10-28 | 1973-04-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-04-28 | 1976-10-28 | 1977-04-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-04-28 | 1980-10-28 | 1981-04-29 | $7700.00 | Window Closed / Lapsed |