US3424255A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Continuous coring jet bit
Assignee: Gulf Research and Development Co
•
Filing: 1966-11-16
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Granted: 1969-01-28
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Expires: 1986-11-16
Abstract
No abstract record available.
Inventors
- 👤 Ernest A Mori
- 👤 Paul W Schaub
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 22:00
CPC Classifications
E; E21; E21B; E21B10/00; E21B10/64; E21B10/02; E21B10/26; E21B10/32; E21B10/322; E21B10/60; E21B10/605; E21B10/62; E21B10/66; E21B49/00; E21B49/02; E21B7/00; E21B7/18
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-01-28 | 1972-07-29 | 1973-01-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-01-28 | 1976-07-29 | 1977-01-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-01-28 | 1980-07-29 | 1981-01-28 | $7700.00 | Window Closed / Lapsed |