Patent US2469109A successfully refreshed from Google Patents.
US2469109A
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Noncorrodible valve
Assignee: Pfaudler Inc
•
Filing: 1943-12-06
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Granted: 1949-05-03
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Expires: 1963-12-06
Abstract
No abstract record available.
Inventors
- 👤 Rudolph F Goecke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 22:24
CPC Classifications
F; F16; F16K; F16K27/00; F16K27/02; F16K27/0272; Y; Y10; Y10T; Y10T137/00; Y10T137/6851; Y10T137/7036
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US192658A
Cited
US1311954A
Cited
GB156922A
Cited
GB262594A
Cited
US1840904A
Cited
US1923306A
Cited
US1947257A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-05-02 | 1952-11-01 | 1953-05-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-05-02 | 1956-11-01 | 1957-05-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-05-02 | 1960-11-01 | 1961-05-03 | $7700.00 | Window Closed / Lapsed |