Patent US2740244A successfully refreshed from Google Patents.
Patent US2641147A successfully refreshed from Google Patents.
US2641147A
Expired / Lapsed
US
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Boring bit guide
Assignee: Individual
•
Filing: 1950-08-31
•
Granted: 1953-06-09
•
Expires: 1970-08-31
Abstract
No abstract record available.
Inventors
- 👤 Sulc Bedrick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 16:22
CPC Classifications
B; B23; B23B; B23B47/00; B23B47/28; B23B47/287; B23B47/288; Y; Y10; Y10T; Y10T408/00; Y10T408/55; Y10T408/563; Y10T408/5633
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US917488A
Cited
US1161479A
Cited
US1233813A
Cited
US1629053A
Cited
US1831813A
Cited
US1762457A
Cited
US2439008A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-06-08 | 1956-12-08 | 1957-06-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-06-08 | 1960-12-08 | 1961-06-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-06-08 | 1964-12-08 | 1965-06-09 | $7700.00 | Window Closed / Lapsed |