Patent US734135A successfully refreshed from Google Patents.
Patent US3528254A successfully refreshed from Google Patents.
US3528254A
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Offshore platform structure and construction method
Assignee: Global Marine Inc
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Filing: 1968-12-03
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Granted: 1970-09-15
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Expires: 1988-12-03
Abstract
No abstract record available.
Inventors
- 👤 John R Graham
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 09:00
CPC Classifications
E; E02; E02B; E02B17/00; E02B17/02; E02B17/0008; E02B17/027; E02B2017/0039; E02B2017/0043; E02B2017/0052; E02B2017/0056; E02B2017/0073
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2433898A
Cited
US2574140A
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US2865179A
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US2940266A
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US3036438A
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US3138432A
Cited
FR1389216A
Cited
US3355899A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-09-14 | 1974-03-16 | 1974-09-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-09-14 | 1978-03-16 | 1978-09-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-09-14 | 1982-03-16 | 1982-09-15 | $7700.00 | Window Closed / Lapsed |