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Patent US3392609A successfully refreshed from Google Patents.
US3392609A
Expired / Lapsed
US
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Well pipe spinning unit
Assignee: Abegg and Reinhold Co
•
Filing: 1966-06-24
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Granted: 1968-07-16
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Expires: 1986-06-24
Abstract
No abstract record available.
Inventors
- 👤 Bartos Josef
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 13:50
CPC Classifications
E; E21; E21B; E21B19/00; E21B19/16; E21B19/168
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1478020A
Cited
US2000221A
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US2332685A
Cited
US2544639A
Cited
US2536458A
Cited
US3144085A
Cited
US3288000A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-07-16 | 1972-01-15 | 1972-07-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-07-16 | 1976-01-15 | 1976-07-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-07-16 | 1980-01-15 | 1980-07-16 | $7700.00 | Window Closed / Lapsed |