US2884009A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluid flow control valve with modulating orifice
Assignee: Individual
•
Filing: 1955-05-16
•
Granted: 1959-04-28
•
Expires: 1975-05-16
Abstract
No abstract record available.
Inventors
- 👤 Sidney W Hetherington
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 09:32
CPC Classifications
F; F16; F16K; F16K31/00; F16K31/02; F16K31/06; F16K31/0644; F16K31/0655; F16K31/0658
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2595171A
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US1186439A
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US1202895A
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US1635040A
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US2181423A
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US2543455A
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US2727715A
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US2768678A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-04-27 | 1962-10-27 | 1963-04-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-04-27 | 1966-10-27 | 1967-04-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-04-27 | 1970-10-27 | 1971-04-28 | $7700.00 | Window Closed / Lapsed |