US2182278A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Valve locking device
Assignee: Individual
•
Filing: 1937-05-01
•
Granted: 1939-12-05
•
Expires: 1957-05-01
Abstract
No abstract record available.
Inventors
- 👤 Brauer Walter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 18:14
CPC Classifications
F; F16; F16K; F16K15/00; F16K15/02; F16K15/06; F16K15/063; F16K15/065; E; E21; E21B; E21B21/00; E21B21/10; Y; Y10; Y10S; Y10S137/00; Y10S137/902; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7837; Y10T137/7904; Y10T137/7908; Y10T137/7909; Y10T137/7913; Y10T137/7915; Y10T137/7919; Y10T137/7922; Y10T137/7929; Y10T137/7931
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) | 1942-12-04 | 1943-06-05 | 1943-12-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1946-12-04 | 1947-06-05 | 1947-12-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1950-12-04 | 1951-06-05 | 1951-12-05 | $7700.00 | Window Closed / Lapsed |