Patent US2811258A successfully refreshed from Google Patents.
US2811258A
Expired / Lapsed
US
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Domestic water-treatment apparatus
Assignee: E C SCHLEYER PUMP Co Inc
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Filing: 1954-04-13
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Granted: 1957-10-29
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Expires: 1974-04-13
Abstract
No abstract record available.
Inventors
- 👤 Schleyer Victor
- 👤 Jack L Henricks
- 👤 Baxter Robert Roy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 03:00
CPC Classifications
C; C02; C02F; C02F1/00; C02F1/58; C02F1/62; C02F1/64; C02F1/645
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US542755A
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US1318774A
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US2543813A
Cited
US2590431A
Cited
GB191319596A
Cited
DE584591C
Cited
US2237882A
Cited
US2237711A
Cited
US2239612A
Cited
US2632733A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-10-28 | 1961-04-29 | 1961-10-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-10-28 | 1965-04-29 | 1965-10-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-10-28 | 1969-04-29 | 1969-10-29 | $7700.00 | Window Closed / Lapsed |