US2990896A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Wing collar drill
Assignee: Individual
•
Filing: 1957-06-13
•
Granted: 1961-07-04
•
Expires: 1977-06-13
Abstract
No abstract record available.
Inventors
- 👤 Charles W Kandle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 05:00
CPC Classifications
E; E21; E21B; E21B7/00; E21B7/20; E21B7/201; E21B10/00; E21B10/26; E21B10/32; E21B10/327; E21B10/44; E21B10/64; E21B10/66; E21B17/00; E21B17/02; E21B17/04; E21B17/046; E21B17/0465
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US443071A
Cited
US693801A
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US1052847A
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US1559761A
Cited
US1604896A
Cited
US1881101A
Cited
US1993366A
Cited
US2320612A
Cited
US2705128A
Cited
US2688465A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-07-03 | 1965-01-02 | 1965-07-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-07-03 | 1969-01-02 | 1969-07-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-07-03 | 1973-01-02 | 1973-07-04 | $7700.00 | Window Closed / Lapsed |