US3015500A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Drill string joint
Assignee: Dresser Industries Inc
•
Filing: 1959-01-08
•
Granted: 1962-01-02
•
Expires: 1979-01-08
Abstract
No abstract record available.
Inventors
- 👤 Paul B Barnett
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 10:18
CPC Classifications
E; E21; E21B; E21B17/00; E21B17/02; E21B17/04; E21B17/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US391313A
Cited
FR745184A
Cited
USRE21606E
Cited
US2267168A
Cited
US1043806A
Cited
US1738021A
Cited
US1790266A
Cited
FR738569A
Cited
GB508498A
Cited
US2795398A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-01-01 | 1965-07-03 | 1966-01-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-01-01 | 1969-07-03 | 1970-01-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-01-01 | 1973-07-03 | 1974-01-02 | $7700.00 | Window Closed / Lapsed |