US1593300A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Valve mechanism for water-softening systems
Assignee: Individual
•
Filing: 1925-03-07
•
Granted: 1926-07-20
•
Expires: 1945-03-07
Abstract
No abstract record available.
Inventors
- 👤 Stanley G Harwood
- 👤 Griswold Donald
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 10:36
CPC Classifications
F; F16; F16K; F16K11/00; F16K11/02; F16K11/08; F16K11/083; F16K11/0836; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/86493; Y10T137/86718; Y10T137/86726
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1929-07-19 | 1930-01-18 | 1930-07-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1933-07-19 | 1934-01-18 | 1934-07-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1937-07-19 | 1938-01-18 | 1938-07-20 | $7700.00 | Window Closed / Lapsed |