Patent US2877958A successfully refreshed from Google Patents.
US2877958A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetic sound recorder-reproducer
Assignee: Revere Camera Co
•
Filing: 1952-06-16
•
Granted: 1959-03-17
•
Expires: 1972-06-16
Abstract
No abstract record available.
Inventors
- 👤 Robert L Moore
- 👤 Pastor Sheldon Lee
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 11:11
CPC Classifications
G; G11; G11B; G11B15/00; G11B15/18; G11B15/44; G11B15/442; G11B15/26; G11B15/32; G11B15/43
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2563545A
Cited
US708128A
Cited
US2118347A
Cited
US2099376A
Cited
US2086130A
Cited
US2267478A
Cited
US2535478A
Cited
US2438222A
Cited
US2609998A
Cited
US2467507A
Cited
US2610808A
Cited
US2464135A
Cited
US2537260A
Cited
US2675185A
Cited
US2558432A
Cited
US2625337A
Cited
US2555643A
Cited
US2665855A
Cited
US2626760A
Cited
US2712448A
Cited
US2596428A
Cited
US2589660A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-03-16 | 1962-09-15 | 1963-03-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-03-16 | 1966-09-15 | 1967-03-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-03-16 | 1970-09-15 | 1971-03-17 | $7700.00 | Window Closed / Lapsed |