Patent US2804090A successfully refreshed from Google Patents.
US2804090A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Annular valve with spring-supported damping plate
Assignee: Hoerbiger and Co
•
Filing: 1954-08-30
•
Granted: 1957-08-27
•
Expires: 1974-08-30
Abstract
No abstract record available.
Inventors
- 👤 Kehler Theodor Karl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 07:58
CPC Classifications
F; F04; F04B; F04B39/00; F04B39/10; F04B39/1053; F16; F16K; F16K15/00; F16K15/02; F16K15/08; F16K15/10; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7837; Y10T137/7859; Y10T137/786
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) | 1960-08-26 | 1961-02-25 | 1961-08-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-08-26 | 1965-02-25 | 1965-08-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-08-26 | 1969-02-25 | 1969-08-27 | $7700.00 | Window Closed / Lapsed |