US2601989A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Balanced three-way valve
Assignee: Powers Regulator Co
•
Filing: 1947-10-08
•
Granted: 1952-07-01
•
Expires: 1967-10-08
Abstract
No abstract record available.
Inventors
- 👤 Edward E Modes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 16:57
CPC Classifications
F; F16; F16K; F16K39/00; F16K39/02; F16K39/022; F16K11/00; F16K11/02; F16K11/04; F16K11/048; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/86493; Y10T137/86815
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US981711A
Cited
US1182287A
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US1177085A
Cited
US1419254A
Cited
US1634781A
Cited
US1556227A
Cited
US1813464A
Cited
GB356292A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-07-01 | 1955-12-31 | 1956-07-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-07-01 | 1959-12-31 | 1960-07-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-07-01 | 1963-12-31 | 1964-07-01 | $7700.00 | Window Closed / Lapsed |