Patent EP0489474A1 successfully refreshed from Google Patents.
US2568518A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gasproof receptacle
Assignee: Ohio Brass Co
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Filing: 1947-08-15
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Granted: 1951-09-18
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Expires: 1967-08-15
Abstract
No abstract record available.
Inventors
- 👤 Edward P Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 16:02
CPC Classifications
E; E21; E21F; E21F9/00; H; H01; H01H; H01H9/00; H01H9/02; H01H9/04; H01H9/042; H01H9/043
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1031624A
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US1316968A
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US1297419A
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GB184410A
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US1612512A
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US2141861A
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US2186185A
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US2401606A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-09-17 | 1955-03-19 | 1955-09-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-09-17 | 1959-03-19 | 1959-09-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-09-17 | 1963-03-19 | 1963-09-18 | $7700.00 | Window Closed / Lapsed |