Patent US2819868A successfully refreshed from Google Patents.
US2819868A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ball valve having adjustable seat unit
Assignee: Elkhart Brass Manufacturing Co LLC
•
Filing: 1956-03-12
•
Granted: 1958-01-14
•
Expires: 1976-03-12
Abstract
No abstract record available.
Inventors
- 👤 John W Cauffman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 18:11
CPC Classifications
F; F16; F16K; F16K5/00; F16K5/08; F16K5/14; F16K5/20; F16K5/201
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US676526A
Cited
GB190918648A
Cited
US1973418A
Cited
GB567133A
Cited
US2529412A
Cited
US2628809A
Cited
US2516947A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-01-13 | 1961-07-15 | 1962-01-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-01-13 | 1965-07-15 | 1966-01-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-01-13 | 1969-07-15 | 1970-01-14 | $7700.00 | Window Closed / Lapsed |