Patent US3067593A successfully refreshed from Google Patents.
US3067593A
Expired / Lapsed
US
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Integral tool joint drill pipe
Assignee: American Iron & Machine Works
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Filing: 1960-08-29
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Granted: 1962-12-11
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Expires: 1980-08-29
Abstract
No abstract record available.
Inventors
- 👤 Mccool Marcus Gresham
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 14:36
CPC Classifications
F; F16; F16L; F16L15/00; F16L15/001; F16L15/004; E; E21; E21B; E21B17/00; E21B17/02; E21B17/04; E21B17/042; E21B17/10; E21B17/1085; Y; Y10; Y10S; Y10S464/00; Y10S464/902
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1993269A
Cited
US2301495A
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US2258066A
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US2239826A
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US2334350A
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DE865883C
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-12-10 | 1966-06-11 | 1966-12-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-12-10 | 1970-06-11 | 1970-12-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-12-10 | 1974-06-11 | 1974-12-11 | $7700.00 | Window Closed / Lapsed |