US2659569A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sealed valve
Assignee: A P CONTROLS Corp
•
Filing: 1951-04-27
•
Granted: 1953-11-17
•
Expires: 1971-04-27
Abstract
No abstract record available.
Inventors
- 👤 Edward C Ehlke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 21:56
CPC Classifications
F; F16; F16K; F16K11/00; F16K11/02; F16K11/06; F16K11/072; F16K11/074; F16K11/0743; F16K41/00; F16K41/10; F16K41/106; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/86493; Y10T137/86839
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1301948A
Cited
US1736974A
Cited
DE353651C
Cited
US1644825A
Cited
US1702762A
Cited
US2065834A
Cited
US2451678A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-11-16 | 1957-05-18 | 1957-11-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-11-16 | 1961-05-18 | 1961-11-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-11-16 | 1965-05-18 | 1965-11-17 | $7700.00 | Window Closed / Lapsed |