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US3370659A
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US
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Drill rod and bit including one-way valve structure therein
Assignee: PAUL GERMAIN GATIEN
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Filing: 1967-06-21
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Granted: 1968-02-27
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Expires: 1987-06-21
Abstract
No abstract record available.
Inventors
- 👤 Gatien Paul Germain
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 20:03
CPC Classifications
E; E21; E21B; E21B21/00; E21B21/10; E21B10/00; E21B10/36; E21B10/38; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7837; Y10T137/7854; Y10T137/7857; Y10T137/7879; Y10T137/788; Y10T137/7882; Y10T137/7885
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US996588A
Cited
US2525954A
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US2674318A
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US2945678A
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US3089551A
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US3200571A
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FR1301646A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-02-26 | 1971-08-28 | 1972-02-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-02-26 | 1975-08-28 | 1976-02-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-02-26 | 1979-08-28 | 1980-02-27 | $7700.00 | Window Closed / Lapsed |