US1944456A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Valve construction
Assignee: Individual
•
Filing: 1932-03-17
•
Granted: 1934-01-23
•
Expires: 1952-03-17
Abstract
No abstract record available.
Inventors
- 👤 Carl A Pearson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 21:32
CPC Classifications
F; F16; F16K; F16K35/00; F16K35/14; Y; Y10; Y10T; Y10T137/00; Y10T137/5109; Y10T137/5283; Y10T137/8593; Y10T137/87096; Y10T137/87113; Y10T137/87571; Y10T137/87676
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1937-01-22 | 1937-07-24 | 1938-01-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1941-01-22 | 1941-07-24 | 1942-01-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1945-01-22 | 1945-07-24 | 1946-01-23 | $7700.00 | Window Closed / Lapsed |