US2233074A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotary gate and orifice valve
Assignee: WILLIAM C BIDDLE
•
Filing: 1939-02-21
•
Granted: 1941-02-25
•
Expires: 1959-02-21
Abstract
No abstract record available.
Inventors
- 👤 Jr Elbert A Corbin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 20:20
CPC Classifications
F; F16; F16K; F16K5/00; F16K5/06; F16K5/0605; F16K5/0626; F16K5/0636; Y; Y10; Y10T; Y10T137/00; Y10T137/598; Y10T137/6031; Y10T137/6058; Y10T137/6062; Y10T137/8593; Y10T137/86292; Y10T137/863
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) | 1944-02-25 | 1944-08-26 | 1945-02-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1948-02-25 | 1948-08-26 | 1949-02-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1952-02-25 | 1952-08-26 | 1953-02-25 | $7700.00 | Window Closed / Lapsed |