Patent US2809073A successfully refreshed from Google Patents.
US2809073A
Expired / Lapsed
US
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Self cleaning strainer for spray nozzle or the like
Assignee: Granite City Steel Co
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Filing: 1956-04-30
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Granted: 1957-10-08
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Expires: 1976-04-30
Abstract
No abstract record available.
Inventors
- 👤 Ernst H Wahlert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 18:50
CPC Classifications
B; B05; B05B; B05B15/00; B05B15/60; B05B15/65; B05B15/658; B05B15/50
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1246355A
Cited
US2197971A
Cited
US2296715A
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US2281499A
Cited
US2429417A
Cited
FR919340A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-10-07 | 1961-04-08 | 1961-10-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-10-07 | 1965-04-08 | 1965-10-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-10-07 | 1969-04-08 | 1969-10-08 | $7700.00 | Window Closed / Lapsed |