US3295613A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Composite drill rod and method for making the same
Assignee: Gardner Denver Inc
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Filing: 1964-08-12
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Granted: 1967-01-03
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Expires: 1984-08-12
Abstract
No abstract record available.
Inventors
- 👤 Floyd R Anderson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 10:42
CPC Classifications
E; E21; E21B; E21B17/00; E21B17/02; E21B17/04; E21B17/042
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
30 words
A PERCUSSIVE DRILL ROD COMPRISING: AN ELONGATED BODY; A SHANK HAVING A BLOW-RECEIVING SURFACE ON ONE END; AND A FRICTION WELDED INTERFACE JOINING SAID BODY AND SHANK IN END-TO-END RELATION.
Claim 2
Dependent Claim
30 words
A PERCUSSIVE DRILL ROD COMPRISING: AN ELONGATED BODY; A SHANK HAVING A BLOW-RECEIVING SURFACE ON ONE END; AND A FRICTION WELDED INTERFACE JOINING SAID BODY AND SHANK IN END-TO-END RELATION.
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) | 1970-01-02 | 1970-07-04 | 1971-01-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-01-02 | 1974-07-04 | 1975-01-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-01-02 | 1978-07-04 | 1979-01-03 | $7700.00 | Window Closed / Lapsed |