US3522670A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for underwater mining
Assignee: Newport News Shipbuilding and Dry Dock Co
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Filing: 1967-07-11
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Granted: 1970-08-04
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Expires: 1987-07-11
Abstract
No abstract record available.
Inventors
- 👤 John E Flipse
- 👤 Robert M Donaldson
- 👤 John L Stevens Jr
- 👤 John L Mero
- 👤 Joseph D Deal Jr
- 👤 Norman D Birrell
- 👤 Nicholas E Oresko
- 👤 Luther E Spencer
- 👤 Alfred E Graham
- 👤 Archer L Jones
- 👤 Ira L Hirshman
- 👤 Frederick S Todd
- 👤 William A Himes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 12:13
CPC Classifications
E; E02; E02F; E02F3/00; E02F3/04; E02F3/88; E02F3/90; E02F3/907; E02F3/8858; E21; E21C; E21C50/00
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) | 1973-08-03 | 1974-02-02 | 1974-08-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-08-03 | 1978-02-02 | 1978-08-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-08-03 | 1982-02-02 | 1982-08-04 | $7700.00 | Window Closed / Lapsed |