US1801959A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pin-control regulating valve
Assignee: Individual
•
Filing: 1929-12-03
•
Granted: 1931-04-21
•
Expires: 1949-12-03
Abstract
No abstract record available.
Inventors
- 👤 Robert C Hopkins
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 15:46
CPC Classifications
F; F16; F16K; F16K1/00; F16K1/32; F16K1/34; F16K1/36; F16K1/38; Y; Y10; Y10S; Y10S137/00; Y10S137/903; Y10T; Y10T137/00; Y10T137/4238; Y10T137/4245; Y10T137/4273; Y10T137/4336; Y10T137/8593; Y10T137/86292; Y10T137/863
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) | 1934-04-20 | 1934-10-20 | 1935-04-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1938-04-20 | 1938-10-20 | 1939-04-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1942-04-20 | 1942-10-20 | 1943-04-21 | $7700.00 | Window Closed / Lapsed |