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US3005507A
Expired / Lapsed
US
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Fluid by-pass for rotary drill bits
Assignee: Houston Oil Field Material Co Inc
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Filing: 1957-09-30
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Granted: 1961-10-24
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Expires: 1977-09-30
Abstract
No abstract record available.
Inventors
- 👤 Jr Earnest H Clark
- 👤 William D Myers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 18:40
CPC Classifications
E; E21; E21B; E21B21/00; E21B21/10; E21B21/103; E21B10/00; E21B10/08; E21B10/18
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1867832A
Cited
US1918096A
Cited
US2198487A
Cited
US2211846A
Cited
US2363290A
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US2726724A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-10-23 | 1965-04-24 | 1965-10-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-10-23 | 1969-04-24 | 1969-10-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-10-23 | 1973-04-24 | 1973-10-24 | $7700.00 | Window Closed / Lapsed |