Patent US2905822A successfully refreshed from Google Patents.
US2905822A
Expired / Lapsed
US
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Operation of pipelines
Assignee: Tracerlab Inc
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Filing: 1955-11-16
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Granted: 1959-09-22
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Expires: 1975-11-16
Abstract
No abstract record available.
Inventors
- 👤 Wendell C Peacock
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 23:02
CPC Classifications
F; F16; F16L; F16L55/00; G; G21; G21H; G21H5/00; G21H5/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2706254A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-09-21 | 1963-03-23 | 1963-09-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-09-21 | 1967-03-23 | 1967-09-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-09-21 | 1971-03-23 | 1971-09-22 | $7700.00 | Window Closed / Lapsed |