US2630290A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Packless valve stem assembly
Assignee: Weatherhead Co
•
Filing: 1948-12-10
•
Granted: 1953-03-03
•
Expires: 1968-12-10
Abstract
No abstract record available.
Inventors
- 👤 Louis B Courtot
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 06:26
CPC Classifications
F; F16; F16K; F16K41/00; F16K41/10; F16K41/12
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1238334A
Cited
US1890505A
Cited
US2001251A
Cited
US2061028A
Cited
US2359992A
Cited
US2371432A
Cited
US2382235A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-03-02 | 1956-09-01 | 1957-03-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-03-02 | 1960-09-01 | 1961-03-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-03-02 | 1964-09-01 | 1965-03-03 | $7700.00 | Window Closed / Lapsed |