US2206905A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flow control mechanism
Assignee: LEONARD ROOKE Co
•
Filing: 1936-10-31
•
Granted: 1940-07-09
•
Expires: 1956-10-31
Abstract
No abstract record available.
Inventors
- 👤 Frederick C Leonard
- 👤 Frederick C Coppage
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 04:12
CPC Classifications
E; E03; E03D; E03D5/00; E03D5/02; E03D5/022; G; G05; G05D; G05D23/00; G05D23/01; G05D23/12; G05D23/125; G05D23/126
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) | 1943-07-09 | 1944-01-08 | 1944-07-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1947-07-09 | 1948-01-08 | 1948-07-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1951-07-09 | 1952-01-08 | 1952-07-09 | $7700.00 | Window Closed / Lapsed |