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US2580340A
Expired / Lapsed
US
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Safety plug for pressure cookers
Assignee: Ekco Products Co
•
Filing: 1947-10-29
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Granted: 1951-12-25
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Expires: 1967-10-29
Abstract
No abstract record available.
Inventors
- 👤 Myron J Zimmer
- 👤 Edmund L Duskey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 05:25
CPC Classifications
A; A47; A47J; A47J27/00; A47J27/08; A47J27/09
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1142902A
Cited
US670794A
Cited
US1750335A
Cited
US2224296A
Cited
US2173999A
Cited
US2301724A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-12-24 | 1955-06-25 | 1955-12-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-12-24 | 1959-06-25 | 1959-12-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-12-24 | 1963-06-25 | 1963-12-25 | $7700.00 | Window Closed / Lapsed |