US2939672A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flexible diaphragm flow control valve
Assignee: Fisher Governor Co
•
Filing: 1958-08-04
•
Granted: 1960-06-07
•
Expires: 1978-08-04
Abstract
No abstract record available.
Inventors
- 👤 Herbert G Rich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 22:20
CPC Classifications
F; F16; F16K; F16K7/00; F16K7/02; F16K7/04; F16K7/07; G; G05; G05D; G05D7/00; G05D7/01; G05D7/0106; G05D7/0113
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-06-07 | 1963-12-07 | 1964-06-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-06-07 | 1967-12-07 | 1968-06-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-06-07 | 1971-12-07 | 1972-06-07 | $7700.00 | Window Closed / Lapsed |