US3371725A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric hammer drill attachment
Assignee: Individual
•
Filing: 1966-03-01
•
Granted: 1968-03-05
•
Expires: 1986-03-01
Abstract
No abstract record available.
Inventors
- 👤 Jansen Johan Wilhelm
- 👤 Hoffmann Hendrik
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 11:51
CPC Classifications
B; B25; B25D; B25D11/00; B25D11/06; B25D11/10; B25D11/102; B25D11/106
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US770455A
Cited
US1665173A
Cited
US3015244A
Cited
US3006202A
Cited
US3256946A
Cited
US3149681A
Cited
US3270821A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-03-05 | 1971-09-04 | 1972-03-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-03-05 | 1975-09-04 | 1976-03-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-03-05 | 1979-09-04 | 1980-03-05 | $7700.00 | Window Closed / Lapsed |