Patent US3383870A successfully refreshed from Google Patents.
US3383870A
Expired / Lapsed
US
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Offshore platform for underwater facilities
Assignee: Lummus Technology LLC
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Filing: 1966-10-28
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Granted: 1968-05-21
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Expires: 1986-10-28
Abstract
No abstract record available.
Inventors
- 👤 Daniel E Costello
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 20:53
CPC Classifications
E; E02; E02B; E02B3/00; E02B3/20; E02B3/24; E02B17/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2768600A
Cited
US2920597A
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US2945465A
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US3120106A
Cited
US3050092A
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US3086367A
Cited
US3245438A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-05-21 | 1971-11-20 | 1972-05-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-05-21 | 1975-11-20 | 1976-05-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-05-21 | 1979-11-20 | 1980-05-21 | $7700.00 | Window Closed / Lapsed |