Patent US2841286A successfully refreshed from Google Patents.
US2841286A
Expired / Lapsed
US
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Water softener
Assignee: Individual
•
Filing: 1955-04-14
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Granted: 1958-07-01
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Expires: 1975-04-14
Abstract
No abstract record available.
Inventors
- 👤 Ralph L Abos
- 👤 Ramon L Abos
- 👤 Carl A Stuewe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 20:26
CPC Classifications
C; C02; C02F; C02F1/00; C02F1/42
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US426918A
Cited
US524155A
Cited
US1677891A
Cited
US1929405A
Cited
US1976906A
Cited
US2462154A
Cited
US2681147A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-06-30 | 1961-12-30 | 1962-07-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-06-30 | 1965-12-30 | 1966-07-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-06-30 | 1969-12-30 | 1970-07-01 | $7700.00 | Window Closed / Lapsed |