US3486343A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Platform for drilling wells at water locations
Assignee: Brown and Root Inc
•
Filing: 1966-09-15
•
Granted: 1969-12-30
•
Expires: 1986-09-15
Abstract
No abstract record available.
Inventors
- 👤 Robert G Gibson
- 👤 Delbert B Johnson
- 👤 John G Mackin Jr
- 👤 James C Stras
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 02:50
CPC Classifications
E; E02; E02B; E02B17/00; E02B17/02; E02B17/027
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
FR510916A
Cited
US2033689A
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US2938352A
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US3104531A
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US3145538A
Cited
US3128604A
Cited
US3209544A
Cited
US3246476A
Cited
US3315473A
Cited
US3364684A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-12-29 | 1973-06-30 | 1973-12-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-12-29 | 1977-06-30 | 1977-12-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-12-29 | 1981-06-30 | 1981-12-30 | $7700.00 | Window Closed / Lapsed |