US2643849A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Screw actuated valve with auxiliary threaded stem support
Assignee: Ohio Brass Co
•
Filing: 1947-05-09
•
Granted: 1953-06-30
•
Expires: 1967-05-09
Abstract
No abstract record available.
Inventors
- 👤 Charles A Davis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 12:00
CPC Classifications
F; F22; F22B; F22B37/00; F22B37/02; F22B37/48; F22B37/54; F22B37/545; F16; F16K; F16K1/00; F16K1/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US20314A
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US262829A
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US333941A
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DE566342C
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US688012A
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US1203371A
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US1457318A
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US1529583A
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US1833193A
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DE580427C
Cited
DE613022C
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-06-29 | 1956-12-29 | 1957-06-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-06-29 | 1960-12-29 | 1961-06-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-06-29 | 1964-12-29 | 1965-06-30 | $7700.00 | Window Closed / Lapsed |