US2541968A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gate valve
Assignee: W K M Co
•
Filing: 1949-04-25
•
Granted: 1951-02-13
•
Expires: 1969-04-25
Abstract
No abstract record available.
Inventors
- 👤 Milton P Laurent
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 19:21
CPC Classifications
F; F16; F16K; F16K31/00; F16K31/12; F16K31/14; F16K31/143
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1455211A
Cited
US1806305A
Cited
US1888392A
Cited
US1854058A
Cited
US2161175A
Cited
US2479124A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-02-12 | 1954-08-14 | 1955-02-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-02-12 | 1958-08-14 | 1959-02-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-02-12 | 1962-08-14 | 1963-02-13 | $7700.00 | Window Closed / Lapsed |