US2025244A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Valve and valve operating mechanism
Assignee: WALWORTH PATENTS Inc
•
Filing: 1931-08-06
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Granted: 1935-12-24
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Expires: 1951-08-06
Abstract
No abstract record available.
Inventors
- 👤 Morehead French Hugh
- 👤 Jr Jesse C Martin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 21:40
CPC Classifications
F; F16; F16K; F16K31/00; F16K31/44; F16K31/53; F16K31/535; Y; Y10; Y10T; Y10T137/00; Y10T137/4238; Y10T137/4358; Y10T137/4386; Y10T137/4393; Y10T137/44; Y10T137/4414
Claims Analysis
Total Claims: 0
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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) | 1938-12-23 | 1939-06-24 | 1939-12-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1942-12-23 | 1943-06-24 | 1943-12-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1946-12-23 | 1947-06-24 | 1947-12-24 | $7700.00 | Window Closed / Lapsed |