US2799872A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lead screw tapping head
Assignee: Individual
•
Filing: 1954-11-19
•
Granted: 1957-07-23
•
Expires: 1974-11-19
Abstract
No abstract record available.
Inventors
- 👤 Krahnke Delbert Carl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 04:38
CPC Classifications
B; B23; B23G; B23G1/00; B23G1/44; B23G1/46; B23G1/465; Y; Y10; Y10T; Y10T408/00; Y10T408/65; Y10T408/675
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
DE524456C
Cited
US2307317A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-07-22 | 1961-01-21 | 1961-07-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-07-22 | 1965-01-21 | 1965-07-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-07-22 | 1969-01-21 | 1969-07-23 | $7700.00 | Window Closed / Lapsed |