Patent US2800229A successfully refreshed from Google Patents.
US2800229A
Expired / Lapsed
US
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Automatic water softener
Assignee: Individual
•
Filing: 1953-12-22
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Granted: 1957-07-23
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Expires: 1973-12-22
Abstract
No abstract record available.
Inventors
- 👤 Jr Charles A Spaulding
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 15:34
CPC Classifications
B; B01; B01J; B01J49/00; B01J49/80; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/86389; Y10T137/86405; Y10T137/86421; Y10T137/87265; Y10T137/87338; Y10T137/87362; Y10T137/8737
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1309611A
Cited
US1990722A
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US2012194A
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US1885454A
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US2042178A
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US2052515A
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US2203040A
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US2265225A
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US2460011A
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US2596915A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-07-22 | 1961-01-21 | 1961-07-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-07-22 | 1965-01-21 | 1965-07-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-07-22 | 1969-01-21 | 1969-07-23 | $7700.00 | Window Closed / Lapsed |