US2872944A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hand valve
Assignee: Individual
•
Filing: 1953-12-04
•
Granted: 1959-02-10
•
Expires: 1973-12-04
Abstract
No abstract record available.
Inventors
- 👤 Walter D Ludwig
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 04:23
CPC Classifications
F; F16; F16K; F16K5/00; F16K5/04; F16K5/0407; F16K7/00; F16K7/02; F16K7/04; F16K7/06; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/86493; Y10T137/86839; Y10T137/86863; Y10T137/86871; Y10T137/87249
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-02-09 | 1962-08-11 | 1963-02-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-02-09 | 1966-08-11 | 1967-02-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-02-09 | 1970-08-11 | 1971-02-10 | $7700.00 | Window Closed / Lapsed |