Patent US2579438A successfully refreshed from Google Patents.
US2579438A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Screw holding screw driver
Assignee: DE PUY MANUFACTURING COMPANY Inc
•
Filing: 1946-02-15
•
Granted: 1951-12-18
•
Expires: 1966-02-15
Abstract
No abstract record available.
Inventors
- 👤 Earl E Longfellow
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:32
CPC Classifications
B; B25; B25B; B25B23/00; B25B23/02; B25B23/08; B25B23/10; B25B23/101; Y; Y10; Y10T; Y10T279/00; Y10T279/17; Y10T279/17411; Y10T279/17418; Y10T279/17427
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US21864A
Cited
US414619A
Cited
US1531567A
Cited
US1558225A
Cited
US1687788A
Cited
US1808660A
Cited
US2214241A
Cited
US2228685A
Cited
US2302691A
Cited
US2320611A
Cited
US2370407A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-12-17 | 1955-06-18 | 1955-12-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-12-17 | 1959-06-18 | 1959-12-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-12-17 | 1963-06-18 | 1963-12-18 | $7700.00 | Window Closed / Lapsed |