US1840228A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pilot pressure control
Assignee: Fisher Governor Co
•
Filing: 1930-01-14
•
Granted: 1932-01-05
•
Expires: 1950-01-14
Abstract
No abstract record available.
Inventors
- 👤 Paul A Elfers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 21:34
CPC Classifications
G; G05; G05D; G05D16/00; G05D16/14; G05D16/18; Y; Y10; Y10T; Y10T137/00; Y10T137/2278; Y10T137/7722; Y10T137/7758; Y10T137/7762; Y10T137/7781; Y10T137/7793; Y10T137/7805; Y10T137/794
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) | 1935-01-04 | 1935-07-06 | 1936-01-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1939-01-04 | 1939-07-06 | 1940-01-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1943-01-04 | 1943-07-06 | 1944-01-05 | $7700.00 | Window Closed / Lapsed |