US2621885A
Expired / Lapsed
US
⏱️ 0.0 years remaining
O ring valve seat
Assignee: RIALTO Corp
•
Filing: 1948-07-02
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Granted: 1952-12-16
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Expires: 1968-07-02
Abstract
No abstract record available.
Inventors
- 👤 William H Schmitt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:43
CPC Classifications
F; F16; F16K; F16K1/00; F16K1/32; F16K1/34; F16K1/46; F16K1/465; Y; Y10; Y10S; Y10S251/00; Y10S251/90; Y10S277/00; Y10S277/91; Y10S285/00; Y10S285/918; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7837; Y10T137/7904; Y10T137/7922; Y10T137/7929; Y10T137/7932; Y10T137/8593; Y10T137/86493; Y10T137/86831
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB190907142A
Cited
US1639853A
Cited
US1744798A
Cited
US1909480A
Cited
US1988545A
Cited
CH177010A
Cited
US2115383A
Cited
US2310536A
Cited
US2417494A
Cited
US2394364A
Cited
US2485504A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-12-16 | 1956-06-16 | 1956-12-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-12-16 | 1960-06-16 | 1960-12-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-12-16 | 1964-06-16 | 1964-12-16 | $7700.00 | Window Closed / Lapsed |