Patent US4748400A successfully refreshed from Google Patents.
Patent US2042178A successfully refreshed from Google Patents.
US2042178A
Expired / Lapsed
US
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Water-softener regenerating process and apparatus
Assignee: Individual
•
Filing: 1932-08-18
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Granted: 1936-05-26
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Expires: 1952-08-18
Abstract
No abstract record available.
Inventors
- 👤 Edward J Lauterbur
- 👤 Wilhelmina S Lauterbur
- 👤 Leo V Lauterbur
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 14:10
CPC Classifications
C; C02; C02F; C02F1/00; C02F1/42; B; B01; B01J; B01J49/00; B01J49/75
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1939-05-26 | 1939-11-25 | 1940-05-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1943-05-26 | 1943-11-25 | 1944-05-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1947-05-26 | 1947-11-25 | 1948-05-26 | $7700.00 | Window Closed / Lapsed |