US3497018A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Marine corer with valve
Assignee: United States Department of the Navy
•
Filing: 1968-10-09
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Granted: 1970-02-24
•
Expires: 1988-10-09
Abstract
No abstract record available.
Inventors
- 👤 William S Shultz
- 👤 George W Gibson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 11:49
CPC Classifications
E; E21; E21B; E21B25/00; E21B25/18; E21B7/00; E21B7/12; E21B7/124; G; G01; G01N; G01N1/00; G01N1/02; G01N1/04; G01N1/08
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US168454A
Cited
US1659826A
Cited
US1807837A
Cited
US2176477A
Cited
DE1236242B
Cited
US3326049A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-02-23 | 1973-08-25 | 1974-02-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-02-23 | 1977-08-25 | 1978-02-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-02-23 | 1981-08-25 | 1982-02-24 | $7700.00 | Window Closed / Lapsed |