US2121464A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Annular valve seat
Assignee: Individual
•
Filing: 1934-03-16
•
Granted: 1938-06-21
•
Expires: 1954-03-16
Abstract
No abstract record available.
Inventors
- 👤 Zagorski Johann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 18:26
CPC Classifications
F; F16; F16K; F16K1/00; F16K1/32; F16K1/34; F16K1/42; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49229; Y10T29/49298; Y10T29/49306; Y10T29/49826; Y10T29/49908; Y10T29/49915; Y10T29/4992; Y10T29/49938; Y10T29/4994
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) | 1941-06-20 | 1941-12-20 | 1942-06-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1945-06-20 | 1945-12-20 | 1946-06-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1949-06-20 | 1949-12-20 | 1950-06-21 | $7700.00 | Window Closed / Lapsed |