US3054466A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Roller assemblies
Assignee: DRILPRODCO Inc
•
Filing: 1959-09-21
•
Granted: 1962-09-18
•
Expires: 1979-09-21
Abstract
No abstract record available.
Inventors
- 👤 Hubert H Wagnon
- 👤 Robert A Blair
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 15:16
CPC Classifications
E; E21; E21B; E21B29/00; E21B29/10; E21B10/00; E21B10/26; E21B10/28; E21B10/30
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1204022A
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US1176964A
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US1685327A
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US1681651A
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US1796479A
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US1812681A
Cited
US1848404A
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US1809258A
Cited
US1988023A
Cited
US1893693A
Cited
US1971561A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-09-17 | 1966-03-19 | 1966-09-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-09-17 | 1970-03-19 | 1970-09-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-09-17 | 1974-03-19 | 1974-09-18 | $7700.00 | Window Closed / Lapsed |