US2686531A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic vent and relief valve for pressure cookers
Assignee: Proctor Electric Co
•
Filing: 1948-03-22
•
Granted: 1954-08-17
•
Expires: 1968-03-22
Abstract
No abstract record available.
Inventors
- 👤 Roger V Eeckhout
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 08:35
CPC Classifications
A; A47; A47J; A47J27/00; A47J27/08; A47J27/0802; A47J27/09; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7738; Y10T137/7739; Y10T137/7837; Y10T137/7838; Y10T137/7839; Y10T137/7841; Y10T137/7866; Y10T137/7904; Y10T137/7908; Y10T137/7909; Y10T137/7913; Y10T137/7915; Y10T137/7918; Y10T137/794
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US851220A
Cited
US1030306A
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US1202067A
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US1515184A
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US1408979A
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US1756787A
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US2071390A
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US2111858A
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US2369932A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-08-16 | 1958-02-15 | 1958-08-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-08-16 | 1962-02-15 | 1962-08-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-08-16 | 1966-02-15 | 1966-08-17 | $7700.00 | Window Closed / Lapsed |