US2467716A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Weighted relief valve
Assignee: KAREN PRODUCTS Inc
•
Filing: 1947-01-24
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Granted: 1949-04-19
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Expires: 1967-01-24
Abstract
No abstract record available.
Inventors
- 👤 Charles W Abercrombie
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 08:57
CPC Classifications
A; A47; A47J; A47J27/00; A47J27/08; A47J27/09; Y; Y10; Y10T; Y10T137/00; Y10T137/1624; Y10T137/1797; Y10T137/7722; Y10T137/7837; Y10T137/7904; Y10T137/7906; Y10T137/8158; Y10T137/8225; Y10T137/8275; Y10T137/8593; Y10T137/86292; Y10T137/8634
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) | 1952-04-18 | 1952-10-18 | 1953-04-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-04-18 | 1956-10-18 | 1957-04-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-04-18 | 1960-10-18 | 1961-04-19 | $7700.00 | Window Closed / Lapsed |