US2689006A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Control for water softening apparatus
Assignee: Lindsay Co
•
Filing: 1951-02-06
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Granted: 1954-09-14
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Expires: 1971-02-06
Abstract
No abstract record available.
Inventors
- 👤 Lynn G Lindsay
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 13:47
CPC Classifications
C; C02; C02F; C02F1/00; C02F1/42; F; F16; F16K; F16K31/00; F16K31/44; F16K31/48; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/86389; Y10T74/00; Y10T74/11; Y10T74/114; Y10T74/116
Claims Analysis
Total Claims: 0
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US2546695A
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US2599151A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-09-13 | 1958-03-15 | 1958-09-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-09-13 | 1962-03-15 | 1962-09-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-09-13 | 1966-03-15 | 1966-09-14 | $7700.00 | Window Closed / Lapsed |