US2855042A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Control for water softening apparatus
Assignee: Lindsay Co
•
Filing: 1954-06-11
•
Granted: 1958-10-07
•
Expires: 1974-06-11
Abstract
No abstract record available.
Inventors
- 👤 Benjamin H Kryzer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 00:40
CPC Classifications
C; C02; C02F; C02F1/00; C02F1/42; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7837; Y10T137/7904; Y10T137/7922; Y10T137/7929; Y10T137/8593; Y10T137/86389; Y10T137/86477; Y10T137/86493; Y10T137/86718; Y10T137/86726; Y10T137/86879; Y10T137/87265; Y10T137/87338; Y10T137/87362; Y10T137/8737
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2454929A
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US2796177A
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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) | 1961-10-06 | 1962-04-07 | 1962-10-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-10-06 | 1966-04-07 | 1966-10-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-10-06 | 1970-04-07 | 1970-10-07 | $7700.00 | Window Closed / Lapsed |