Patent US2643849A successfully refreshed from Google Patents.
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
2026-11-02 20:46
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
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US20314A
Cited
US262829A
Cited
US333941A
Cited
DE566342C
Cited
US688012A
Cited
US1203371A
Cited
US1457318A
Cited
US1529583A
Cited
US1833193A
Cited
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 |