US1664901A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Duplex valve and mixer
Assignee: Individual
•
Filing: 1922-11-14
•
Granted: 1928-04-03
•
Expires: 1942-11-14
Abstract
No abstract record available.
Inventors
- 👤 Rosenbaum Benjamin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 01:02
CPC Classifications
F; F16; F16K; F16K11/00; F16K11/10; F16K11/14; F16K11/18; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/87249
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) | 1931-04-03 | 1931-10-03 | 1932-04-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1935-04-03 | 1935-10-03 | 1936-04-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1939-04-03 | 1939-10-03 | 1940-04-03 | $7700.00 | Window Closed / Lapsed |