US2919805A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Water softener
Assignee: Elgin Softener Corp
•
Filing: 1954-03-12
•
Granted: 1960-01-05
•
Expires: 1974-03-12
Abstract
No abstract record available.
Inventors
- 👤 Chester R Nickols
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 09:35
CPC Classifications
C; C02; C02F; C02F1/00; C02F1/42; F; F16; F16K; F16K11/00; F16K11/02; F16K11/06; F16K11/065; F16K31/00; F16K31/44; F16K31/52; F16K31/524
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1346898A
Cited
US1630512A
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US1768184A
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US1893933A
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US2067808A
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US2051155A
Cited
GB470842A
Cited
US2209487A
Cited
US2363167A
Cited
GB528672A
Cited
US2407538A
Cited
US2539748A
Cited
US2636560A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-01-04 | 1963-07-06 | 1964-01-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-01-04 | 1967-07-06 | 1968-01-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-01-04 | 1971-07-06 | 1972-01-05 | $7700.00 | Window Closed / Lapsed |