Patent US3455904A successfully refreshed from Google Patents.
US3455904A
Expired / Lapsed
US
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Device for sampling fluids
Assignee: Shell USA Inc
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Filing: 1967-03-23
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Granted: 1969-07-15
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Expires: 1987-03-23
Abstract
No abstract record available.
Inventors
- 👤 Edmund A Hopkin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 16:54
CPC Classifications
E; E21; E21B; E21B49/00; E21B49/08; E21B49/081; E21B49/0815
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) | 1972-07-14 | 1973-01-13 | 1973-07-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-07-14 | 1977-01-13 | 1977-07-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-07-14 | 1981-01-13 | 1981-07-15 | $7700.00 | Window Closed / Lapsed |