US2639723A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multiway valve
Assignee: LIQUIDEPTH INDICATORS Inc
•
Filing: 1950-01-30
•
Granted: 1953-05-26
•
Expires: 1970-01-30
Abstract
No abstract record available.
Inventors
- 👤 Daniel H Bierman
- 👤 Joseph A Jawett
- 👤 Arthur D Bierman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 12:54
CPC Classifications
F; F16; F16K; F16K37/00; Y; Y10; Y10T; Y10T137/00; Y10T137/5109; Y10T137/6851; Y10T137/7043; Y10T137/7062; Y10T137/8593; Y10T137/877; Y10T137/87829; Y10T137/87837; Y10T137/87861; Y10T137/87869
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US941760A
Cited
US998843A
Cited
US1475252A
Cited
US1585084A
Cited
US1834033A
Cited
US2179750A
Cited
US2333060A
Cited
US2501706A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-05-25 | 1956-11-24 | 1957-05-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-05-25 | 1960-11-24 | 1961-05-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-05-25 | 1964-11-24 | 1965-05-26 | $7700.00 | Window Closed / Lapsed |