US2217876A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Valve for controlling and interrupting the flow of fluids
Assignee: Shell Development Co
•
Filing: 1939-03-24
•
Granted: 1940-10-15
•
Expires: 1959-03-24
Abstract
No abstract record available.
Inventors
- 👤 Richardson Arthur Whittaker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 06:55
CPC Classifications
F; F16; F16K; F16K5/00; F16K5/08; F16K5/10; Y; Y10; Y10T; Y10T137/00; Y10T137/1842; Y10T137/1939; Y10T137/1963; Y10T137/8593; Y10T137/86292; Y10T137/8634
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) | 1943-10-15 | 1944-04-15 | 1944-10-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1947-10-15 | 1948-04-15 | 1948-10-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1951-10-15 | 1952-04-15 | 1952-10-15 | $7700.00 | Window Closed / Lapsed |