US2420849A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Valve
Assignee: Everlasting Valve Co Inc
•
Filing: 1943-09-25
•
Granted: 1947-05-20
•
Expires: 1963-09-25
Abstract
No abstract record available.
Inventors
- 👤 Wylie G Wilson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 17:10
CPC Classifications
F; F16; F16K; F16K3/00; F16K3/28
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
GB190509072A
Cited
US1089160A
Cited
US1064376A
Cited
GB168260A
Cited
DE409308C
Cited
US1633690A
Cited
US1613072A
Cited
US1833700A
Cited
GB372482A
Cited
US2044590A
Cited
US2162990A
Cited
US2194261A
Cited
US2290251A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-05-19 | 1950-11-18 | 1951-05-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-05-19 | 1954-11-18 | 1955-05-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-05-19 | 1958-11-18 | 1959-05-20 | $7700.00 | Window Closed / Lapsed |