US2545425A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Water-softening apparatus and system
Assignee: Individual
•
Filing: 1947-07-31
•
Granted: 1951-03-13
•
Expires: 1967-07-31
Abstract
No abstract record available.
Inventors
- 👤 Harry C Fischer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:45
CPC Classifications
C; C02; C02F; C02F1/00; C02F1/42; Y; Y10; Y10T; Y10T137/00; Y10T137/2713; Y10T137/272; Y10T137/2842; Y10T137/2917; Y10T137/4673; Y10T137/4841; Y10T137/7287; Y10T137/7313; Y10T137/7323
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2050614A
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US1611422A
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US1913238A
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US2003739A
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US2132312A
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US2329052A
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US2407539A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-03-12 | 1954-09-11 | 1955-03-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-03-12 | 1958-09-11 | 1959-03-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-03-12 | 1962-09-11 | 1963-03-13 | $7700.00 | Window Closed / Lapsed |