US3381485A
Expired / Lapsed
US
⏱️ 0.0 years remaining
General purpose underwater manipulating system
Assignee: Battelle Development Corp
•
Filing: 1965-10-23
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Granted: 1968-05-07
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Expires: 1985-10-23
Abstract
No abstract record available.
Inventors
- 👤 Ralph K Crooks
- 👤 James M Hardenbrook
- 👤 Richard D Leis
- 👤 James C Swain
- 👤 David L Thomas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 21:32
CPC Classifications
E; E21; E21B; E21B41/00; E21B41/04; B; B25; B25J; B25J11/00; B25J19/00; B25J19/02; B25J19/021; B25J19/023; B63; B63C; B63C11/00; B63C11/52; B63G; B63G8/00; B63G8/001; B63G2008/002; B63G2008/005; B63G2008/007
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2987893A
Cited
US3066805A
Cited
US3247979A
Cited
US3165899A
Cited
US3291321A
Cited
US3280991A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-05-07 | 1971-11-06 | 1972-05-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-05-07 | 1975-11-06 | 1976-05-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-05-07 | 1979-11-06 | 1980-05-07 | $7700.00 | Window Closed / Lapsed |