US2456403A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Diaphragm control valve
Assignee: BELFIELD Co H
•
Filing: 1944-02-12
•
Granted: 1948-12-14
•
Expires: 1964-02-12
Abstract
No abstract record available.
Inventors
- 👤 Goehring Francis Rudolph
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 09:24
CPC Classifications
F; F16; F16K; F16K31/00; F16K31/12; F16K31/126; F16K31/1262; Y; Y10; Y10T; Y10T137/00; Y10T137/8158; Y10T137/8225; Y10T137/8275; Y10T137/8292; Y10T403/00; Y10T403/32; Y10T403/32114; Y10T403/32213
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1273304A
Cited
US2001318A
Cited
FR749705A
Cited
US1959259A
Cited
US2110859A
Cited
US2264677A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-12-14 | 1952-06-14 | 1952-12-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-12-14 | 1956-06-14 | 1956-12-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-12-14 | 1960-06-14 | 1960-12-14 | $7700.00 | Window Closed / Lapsed |