US2428002A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Wire type recording and reproducing apparatus
Assignee: ANN K BARRETT
•
Filing: 1945-03-09
•
Granted: 1947-09-30
•
Expires: 1965-03-09
Abstract
No abstract record available.
Inventors
- 👤 Edward L Barrett
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 19:57
CPC Classifications
G; G11; G11B; G11B25/00; G11B25/08
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
DE585406C
Cited
US407277A
Cited
FR336225A
Cited
US832069A
Cited
US1003484A
Cited
US909414A
Cited
US1513403A
Cited
US1666077A
Cited
DE584219C
Cited
US1949409A
Cited
US1858553A
Cited
GB459035A
Cited
US2210770A
Cited
US2340440A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-09-29 | 1951-03-31 | 1951-09-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-09-29 | 1955-03-31 | 1955-09-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-09-29 | 1959-03-31 | 1959-09-30 | $7700.00 | Window Closed / Lapsed |