Patent US2513683A successfully refreshed from Google Patents.
US2513683A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetic recording and reproducing
Assignee: Brush Development Co
•
Filing: 1946-03-19
•
Granted: 1950-07-04
•
Expires: 1966-03-19
Abstract
No abstract record available.
Inventors
- 👤 Harry B Shaper
- 👤 Harry B Miller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:28
CPC Classifications
G; G11; G11B; G11B5/00; B; B41; B41J; B41J3/00; B41J3/44; B41J3/50; G11B5/02
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2262407A
Cited
US2334726A
Cited
US2378388A
Cited
US2370133A
Cited
US2343099A
Cited
US2378383A
Cited
US2424218A
Cited
US2409577A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-07-03 | 1954-01-02 | 1954-07-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-07-03 | 1958-01-02 | 1958-07-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-07-03 | 1962-01-02 | 1962-07-04 | $7700.00 | Window Closed / Lapsed |