Patent US2674906A successfully refreshed from Google Patents.
US2674906A
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Hole spacing attachment for drill presses
Assignee: ROBERT F KRAINZ
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Filing: 1950-08-31
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Granted: 1954-04-13
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Expires: 1970-08-31
Abstract
No abstract record available.
Inventors
- 👤 Timpner Henry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 20:39
CPC Classifications
B; B23; B23B; B23B47/00; B23B47/28; B23B35/00; B23Q; B23Q35/00; B23Q35/02; B23B2247/00; B23B2247/04; B23B2247/08; Y; Y10; Y10T; Y10T408/00; Y10T408/55; Y10T408/557; Y10T408/561; Y10T408/5623; Y10T408/56245; Y10T408/564; Y10T408/5653
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-04-12 | 1957-10-12 | 1958-04-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-04-12 | 1961-10-12 | 1962-04-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-04-12 | 1965-10-12 | 1966-04-13 | $7700.00 | Window Closed / Lapsed |