US2980388A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Butterfly valve
Assignee: Baldwin Lima Hamilton Corp
•
Filing: 1955-04-15
•
Granted: 1961-04-18
•
Expires: 1975-04-15
Abstract
No abstract record available.
Inventors
- 👤 White Ira Morgan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 17:25
CPC Classifications
F; F16; F16K; F16K1/00; F16K1/16; F16K1/18; F16K1/22; F16K1/226
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US192633A
Cited
US1588445A
Cited
GB302526A
Cited
US2107200A
Cited
US2260381A
Cited
US2586927A
Cited
US2657896A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-04-17 | 1964-10-17 | 1965-04-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-04-17 | 1968-10-17 | 1969-04-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-04-17 | 1972-10-17 | 1973-04-18 | $7700.00 | Window Closed / Lapsed |