US2615465A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Self-cleaning valve
Assignee: Individual
•
Filing: 1949-03-21
•
Granted: 1952-10-28
•
Expires: 1969-03-21
Abstract
No abstract record available.
Inventors
- 👤 Woodward Erwin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 13:04
CPC Classifications
F; F16; F16K; F16K29/00; Y; Y10; Y10T; Y10T137/00; Y10T137/4238; Y10T137/4245; Y10T137/4273; Y10T137/428; Y10T137/4294
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB190717134A
Cited
US923808A
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US1370760A
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US1260509A
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US1346210A
Cited
US1568057A
Cited
US1629627A
Cited
US1605460A
Cited
US1423340A
Cited
US1633811A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-10-28 | 1956-04-28 | 1956-10-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-10-28 | 1960-04-28 | 1960-10-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-10-28 | 1964-04-28 | 1964-10-28 | $7700.00 | Window Closed / Lapsed |