US3412564A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sub-sea working and drilling apparatus
Assignee: PIKE CORP OF AMERICA
•
Filing: 1967-02-21
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Granted: 1968-11-26
•
Expires: 1987-02-21
Abstract
No abstract record available.
Inventors
- 👤 Ross A Mcclintock
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 18:12
CPC Classifications
E; E02; E02B; E02B17/00; E02B17/02; E21; E21B; E21B7/00; E21B7/12; E21B7/136; E02B2017/0039; E02B2017/0043; E02B2017/0052; E02B2017/0095
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2736172A
Cited
US2217879A
Cited
US2912828A
Cited
US2940266A
Cited
US3036438A
Cited
US3138932A
Cited
US3307624A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-11-26 | 1972-05-27 | 1972-11-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-11-26 | 1976-05-27 | 1976-11-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-11-26 | 1980-05-27 | 1980-11-26 | $7700.00 | Window Closed / Lapsed |