Patent US2766009A successfully refreshed from Google Patents.
Patent US2366520A successfully refreshed from Google Patents.
US2366520A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Valve seat ring
Assignee: Individual
•
Filing: 1943-11-02
•
Granted: 1945-01-02
•
Expires: 1963-11-02
Abstract
No abstract record available.
Inventors
- 👤 William B Griffith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 22:01
CPC Classifications
F; F16; F16K; F16K1/00; F16K1/16; F16K1/18; F16K1/20; F16K1/2007; F16K1/2014; F16K1/2042; F16K1/2057; F16K1/2071; Y; Y10; Y10T; Y10T137/00; Y10T137/598; Y10T137/6154
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1948-01-02 | 1948-07-03 | 1949-01-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1952-01-02 | 1952-07-03 | 1953-01-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1956-01-02 | 1956-07-03 | 1957-01-02 | $7700.00 | Window Closed / Lapsed |