US2499700A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetic recording and reproducing apparatus
Assignee: MAGNECORD Inc
•
Filing: 1947-12-30
•
Granted: 1950-03-07
•
Expires: 1967-12-30
Abstract
No abstract record available.
Inventors
- 👤 Russell J Tinkham
- 👤 Robert L Landon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 16:57
CPC Classifications
G; G11; G11B; G11B15/00; G11B15/70; G11B23/00; G11B23/02; G11B23/04; G11B23/06
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US667436A
Cited
US879691A
Cited
US1282154A
Cited
US1296476A
Cited
US1297049A
Cited
DE390878C
Cited
FR696161A
Cited
GB441479A
Cited
US2109627A
Cited
US2259517A
Cited
US2410569A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-03-06 | 1953-09-05 | 1954-03-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-03-06 | 1957-09-05 | 1958-03-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-03-06 | 1961-09-05 | 1962-03-07 | $7700.00 | Window Closed / Lapsed |