US2209565A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Valve control
Assignee: HYDOORAULIC Inc
•
Filing: 1936-02-21
•
Granted: 1940-07-30
•
Expires: 1956-02-21
Abstract
No abstract record available.
Inventors
- 👤 William A Harris
- 👤 Charles W Van Blarcom
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 10:06
CPC Classifications
F; F16; F16K; F16K31/00; F16K31/12; F16K31/122; F16K31/124; Y; Y10; Y10S; Y10S60/00; Y10S60/911
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) | 1943-07-30 | 1944-01-29 | 1944-07-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1947-07-30 | 1948-01-29 | 1948-07-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1951-07-30 | 1952-01-29 | 1952-07-30 | $7700.00 | Window Closed / Lapsed |