US2220920A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Valve device for a fluid power transmission mechanism
Assignee: United Shoe Machinery Corp
•
Filing: 1938-05-19
•
Granted: 1940-11-12
•
Expires: 1958-05-19
Abstract
No abstract record available.
Inventors
- 👤 Frank E Stratton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 17:15
CPC Classifications
F; F15; F15B; F15B21/00; F16; F16K; F16K15/00; F16K15/02; F16K15/04; F16K15/044; F16K15/18; F16K15/182; F16K15/1823; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7781; Y10T137/7837; Y10T137/7876; Y10T137/7904; Y10T137/7922; Y10T137/7927
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) | 1943-11-12 | 1944-05-13 | 1944-11-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1947-11-12 | 1948-05-13 | 1948-11-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1951-11-12 | 1952-05-13 | 1952-11-12 | $7700.00 | Window Closed / Lapsed |