US2997207A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flow control valve
Assignee: Buckeye Iron and Brass Works
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Filing: 1960-02-23
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Granted: 1961-08-22
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Expires: 1980-02-23
Abstract
No abstract record available.
Inventors
- 👤 Lawrence A Botkin
- 👤 Kenneth D Allen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 02:49
CPC Classifications
B; B67; B67D; B67D7/00; B67D7/06; B67D7/36; F; F16; F16K; F16K39/00; F16K39/02; F16K39/028
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) | 1964-08-21 | 1965-02-20 | 1965-08-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-08-21 | 1969-02-20 | 1969-08-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-08-21 | 1973-02-20 | 1973-08-22 | $7700.00 | Window Closed / Lapsed |