US3029608A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Platform for off shore drilling and supporting columns therefor
Assignee: BEULAH PERKINS
•
Filing: 1956-12-28
•
Granted: 1962-04-17
•
Expires: 1976-12-28
Abstract
No abstract record available.
Inventors
- 👤 Perkins Starling
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 22:20
CPC Classifications
E; E02; E02B; E02B17/00; E02B2017/0056; E02B2017/0073; E02B2017/0082
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2210408A
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US2574140A
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US2607198A
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US2628818A
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US2589146A
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US2743585A
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US2771747A
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US2865179A
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US2892314A
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US2857744A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-04-16 | 1965-10-16 | 1966-04-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-04-16 | 1969-10-16 | 1970-04-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-04-16 | 1973-10-16 | 1974-04-17 | $7700.00 | Window Closed / Lapsed |