US2714633A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Perspective sound systems
Assignee: Perspecta Sound Inc
•
Filing: 1953-10-08
•
Granted: 1955-08-02
•
Expires: 1973-10-08
Abstract
No abstract record available.
Inventors
- 👤 Fine Clarence Robert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 06:39
CPC Classifications
H; H04; H04S; H04S3/00; H04R; H04R3/00; H04R3/12; H04S5/00; H04S2400/00; H04S2400/01; Y; Y10; Y10S; Y10S84/00; Y10S84/27
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2116314A
Cited
US2207249A
Cited
US2298618A
Cited
US2313867A
Cited
US2361490A
Cited
US2499587A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-08-01 | 1959-01-31 | 1959-08-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-08-01 | 1963-01-31 | 1963-08-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-08-01 | 1967-01-31 | 1967-08-02 | $7700.00 | Window Closed / Lapsed |