Patent US2935198A successfully refreshed from Google Patents.
US2935198A
Expired / Lapsed
US
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Control for water softeners
Assignee: Union Tank Car Co
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Filing: 1955-05-20
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Granted: 1960-05-03
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Expires: 1975-05-20
Abstract
No abstract record available.
Inventors
- 👤 Benjamin H Kryzer
- 👤 Thomas W Techler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 12:24
CPC Classifications
C; C02; C02F; C02F1/00; C02F1/68; C02F1/685; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/87056; Y10T137/87088; Y10T74/00; Y10T74/21; Y10T74/2101; Y10T74/2102
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1365541A
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US1661676A
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US1704982A
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US2240171A
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US2539221A
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US2571000A
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US2689006A
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US2642503A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-05-03 | 1963-11-02 | 1964-05-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-05-03 | 1967-11-02 | 1968-05-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-05-03 | 1971-11-02 | 1972-05-03 | $7700.00 | Window Closed / Lapsed |