Patent US2991834A successfully refreshed from Google Patents.
US2991834A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cutting tool
Assignee: Individual
•
Filing: 1957-08-21
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Granted: 1961-07-11
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Expires: 1977-08-21
Abstract
No abstract record available.
Inventors
- 👤 Thomas A Kennard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 10:53
CPC Classifications
E; E21; E21B; E21B29/00; E21B29/002; E21B29/005; E21B31/00; E21B31/12; E21B31/16; E21B31/20
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1941703A
Cited
US1867289A
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US1992933A
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US2203011A
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US2202986A
Cited
US2659434A
Cited
US2604945A
Cited
US2623593A
Cited
US2665765A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-07-10 | 1965-01-09 | 1965-07-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-07-10 | 1969-01-09 | 1969-07-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-07-10 | 1973-01-09 | 1973-07-11 | $7700.00 | Window Closed / Lapsed |