US2585575A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Safety valve with spring loaded diaphragm
Assignee: Individual
•
Filing: 1948-02-27
•
Granted: 1952-02-12
•
Expires: 1968-02-27
Abstract
No abstract record available.
Inventors
- 👤 Nedergaa Hans Christie Richard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 00:56
CPC Classifications
F; F16; F16K; F16K17/00; F16K17/02; F16K17/04; F16K17/08; F16K17/085; F16K17/044; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7738; Y10T137/774; Y10T137/7781; Y10T137/7835; Y10T137/7836
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1290030A
Cited
DE597093C
Cited
FR395923A
Cited
US1185596A
Cited
GB198771A
Cited
US1521081A
Cited
US1786402A
Cited
US2318157A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-02-11 | 1955-08-13 | 1956-02-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-02-11 | 1959-08-13 | 1960-02-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-02-11 | 1963-08-13 | 1964-02-12 | $7700.00 | Window Closed / Lapsed |