US1643082A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic pressure-controlled valve
Assignee: Individual
•
Filing: 1926-05-27
•
Granted: 1927-09-20
•
Expires: 1946-05-27
Abstract
No abstract record available.
Inventors
- 👤 Charles H Nickell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 09:58
CPC Classifications
G; G05; G05D; G05D9/00; G05D9/04; G05D16/00; G05D16/14; G05D16/18; Y; Y10; Y10T; Y10T137/00; Y10T137/2931; Y10T137/3115; Y10T137/3118; Y10T137/7287; Y10T137/7358; Y10T137/7368; Y10T137/7371
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) | 1930-09-19 | 1931-03-21 | 1931-09-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1934-09-19 | 1935-03-21 | 1935-09-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1938-09-19 | 1939-03-21 | 1939-09-20 | $7700.00 | Window Closed / Lapsed |