US3135137A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Safety mechanism for portable electric drills
Assignee: Individual
•
Filing: 1963-01-14
•
Granted: 1964-06-02
•
Expires: 1983-01-14
Abstract
No abstract record available.
Inventors
- 👤 Arthur W Cunningham
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 04:21
CPC Classifications
B; B23; B23Q; B23Q11/00; B23Q11/0078; B23Q11/0092; Y; Y10; Y10S; Y10S408/00; Y10S408/71; Y10T; Y10T408/00; Y10T408/65; Y10T408/70
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) | 1967-06-02 | 1967-12-02 | 1968-06-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-06-02 | 1971-12-02 | 1972-06-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-06-02 | 1975-12-02 | 1976-06-02 | $7700.00 | Window Closed / Lapsed |