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US2637529A
Expired / Lapsed
US
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Cutting tool
Assignee: Individual
•
Filing: 1947-10-27
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Granted: 1953-05-05
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Expires: 1967-10-27
Abstract
No abstract record available.
Inventors
- 👤 Everett C Howell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 12:09
CPC Classifications
E; E21; E21B; E21B10/00; E21B10/26; E21B10/28; E21B10/08; E21B10/12
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1733372A
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US893950A
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US1176965A
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US1370492A
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US1572349A
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US1640644A
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US1747908A
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US1627179A
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US1826059A
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US1780447A
Cited
US2184108A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-05-04 | 1956-11-03 | 1957-05-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-05-04 | 1960-11-03 | 1961-05-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-05-04 | 1964-11-03 | 1965-05-05 | $7700.00 | Window Closed / Lapsed |