Patent US2953158A successfully refreshed from Google Patents.
US2953158A
Expired / Lapsed
US
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Apparatus for evacuating pipelines
Assignee: Shell USA Inc
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Filing: 1958-03-31
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Granted: 1960-09-20
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Expires: 1978-03-31
Abstract
No abstract record available.
Inventors
- 👤 Shea Carter Laurence
- 👤 Gail D Harden
- 👤 Jr Maurice L Barrett
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 20:28
CPC Classifications
F; F16; F16L; F16L55/00; F17; F17D; F17D3/00; F17D3/03; F17D3/08; Y; Y10; Y10T; Y10T137/00; Y10T137/4891
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-09-20 | 1964-03-21 | 1964-09-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-09-20 | 1968-03-21 | 1968-09-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-09-20 | 1972-03-21 | 1972-09-20 | $7700.00 | Window Closed / Lapsed |