Patent US2822150A successfully refreshed from Google Patents.
US2822150A
Expired / Lapsed
US
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Rotary expansible drill bits
Assignee: Baker Hughes Oilfield Operations LLC
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Filing: 1955-04-18
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Granted: 1958-02-04
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Expires: 1975-04-18
Abstract
No abstract record available.
Inventors
- 👤 John F Muse
- 👤 Kriegel Bernard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 13:03
CPC Classifications
E; E21; E21B; E21B10/00; E21B10/26; E21B10/32; E21B10/322; Y; Y10; Y10T; Y10T407/00; Y10T407/19; Y10T407/1906; Y10T407/1928; Y10T407/193
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) | 1961-02-03 | 1961-08-05 | 1962-02-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-02-03 | 1965-08-05 | 1966-02-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-02-03 | 1969-08-05 | 1970-02-04 | $7700.00 | Window Closed / Lapsed |