US2826095A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High speed drilling attachment
Assignee: DIRZIUS
•
Filing: 1954-12-01
•
Granted: 1958-03-11
•
Expires: 1974-12-01
Abstract
No abstract record available.
Inventors
- 👤 Bennie F Dirzius
- 👤 Robert H Mayfield
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:02
CPC Classifications
B; B23; B23Q; B23Q5/00; B23Q5/02; B23Q5/04; B23Q5/043; B23Q5/048; Y; Y10; Y10T; Y10T74/00; Y10T74/21; Y10T74/2186
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US638643A
Cited
US721930A
Cited
US1721612A
Cited
GB349272A
Cited
US2368133A
Cited
US2420040A
Cited
US2590649A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-03-10 | 1961-09-09 | 1962-03-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-03-10 | 1965-09-09 | 1966-03-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-03-10 | 1969-09-09 | 1970-03-11 | $7700.00 | Window Closed / Lapsed |