US3244242A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Drilling equipment
Assignee: KERR MC GEE OIL IND Inc
•
Filing: 1960-09-19
•
Granted: 1966-04-05
•
Expires: 1980-09-19
Abstract
No abstract record available.
Inventors
- 👤 Paul A Wolff
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 22:23
CPC Classifications
E; E21; E21B; E21B15/00; E21B15/003
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1829304A
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US2399656A
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US2592448A
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US2628818A
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US2699042A
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US3001593A
Cited
US3001594A
Cited
US3001592A
Cited
US3081600A
Cited
US2975601A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-04-04 | 1969-10-04 | 1970-04-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-04-04 | 1973-10-04 | 1974-04-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-04-04 | 1977-10-04 | 1978-04-05 | $7700.00 | Window Closed / Lapsed |