Patent US2726683A successfully refreshed from Google Patents.
US2726683A
Expired / Lapsed
US
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Pipe blind with failure indicator
Assignee: Standard Oil Co
•
Filing: 1951-08-30
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Granted: 1955-12-13
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Expires: 1971-08-30
Abstract
No abstract record available.
Inventors
- 👤 Arthur J Steinbach
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 21:01
CPC Classifications
F; F16; F16L; F16L55/00; F16L55/10; F16L55/105; F16L2201/00; F16L2201/30; Y; Y10; Y10T; Y10T137/00; Y10T137/8158
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US568680A
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US1426956A
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US1485913A
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US2014000A
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US1962168A
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US1926373A
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US2271282A
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US2484622A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-12-12 | 1959-06-13 | 1959-12-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-12-12 | 1963-06-13 | 1963-12-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-12-12 | 1967-06-13 | 1967-12-13 | $7700.00 | Window Closed / Lapsed |