US3487729A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Positive depth control drill
Assignee: Zephyr Manufacturing Co Inc
•
Filing: 1967-12-06
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Granted: 1970-01-06
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Expires: 1987-12-06
Abstract
No abstract record available.
Inventors
- 👤 Daniel P Juhasz
- 👤 Luis A Bohorquez
- 👤 Pierre G Vindez
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 05:59
CPC Classifications
B; B23; B23Q; B23Q11/00; B23Q11/0078; B23Q11/0092; B23Q16/00; B23Q5/00; B23Q5/22; B23Q5/32; B23Q5/326; Y; Y10; Y10T; Y10T408/00; Y10T408/18
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) | 1973-01-05 | 1973-07-07 | 1974-01-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-01-05 | 1977-07-07 | 1978-01-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-01-05 | 1981-07-07 | 1982-01-06 | $7700.00 | Window Closed / Lapsed |