US2789573A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Water conditioning system with constant dosage of the conditioning agent
Assignee: Individual
•
Filing: 1953-08-26
•
Granted: 1957-04-23
•
Expires: 1973-08-26
Abstract
No abstract record available.
Inventors
- 👤 Donald C Glass
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 22:54
CPC Classifications
C; C02; C02F; C02F1/00; C02F1/68; C02F1/685; C02F1/686; A; A01; A01K; A01K7/00; A01K7/02; A01K7/028; Y; Y10; Y10T; Y10T137/00; Y10T137/2496; Y10T137/2514; Y10T137/2534; Y10T137/2536; Y10T137/7287; Y10T137/7358; Y10T137/7381; Y10T137/7384; Y10T137/8593; Y10T137/87571; Y10T137/87587; Y10T137/87611
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
DE8839C
Cited
US734144A
Cited
US1934791A
Cited
US2057027A
Cited
US2039275A
Cited
US2465866A
Cited
US2558469A
Cited
US2524966A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-04-22 | 1960-10-22 | 1961-04-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-04-22 | 1964-10-22 | 1965-04-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-04-22 | 1968-10-22 | 1969-04-23 | $7700.00 | Window Closed / Lapsed |