Patent US2712871A successfully refreshed from Google Patents.
US2712871A
Expired / Lapsed
US
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Duplex strainer
Assignee: J A ZURN Manufacturing Co
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Filing: 1951-06-02
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Granted: 1955-07-12
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Expires: 1971-06-02
Abstract
No abstract record available.
Inventors
- 👤 John H Schmid
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 15:47
CPC Classifications
B; B01; B01D; B01D35/00; B01D35/12; B01D35/14; B01D2201/00; B01D2201/29; B01D2201/291; B01D2201/296
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US782866A
Cited
US1152831A
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US1213764A
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US1189077A
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GB275383A
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US2068468A
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US2552991A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-07-11 | 1959-01-10 | 1959-07-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-07-11 | 1963-01-10 | 1963-07-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-07-11 | 1967-01-10 | 1967-07-12 | $7700.00 | Window Closed / Lapsed |