US3133993A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stereo fm transmission system
Assignee: Zenith Electronics LLC
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Filing: 1960-04-18
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Granted: 1964-05-19
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Expires: 1980-04-18
Abstract
No abstract record available.
Inventors
- 👤 Vries Adrian J De
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 09:19
CPC Classifications
H; H04; H04H; H04H20/00; H04H20/44; H04H20/46; H04H20/47; H04H20/48
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
23 words
A RECEIVER FOR A STEREO FM TRANSMISSION SYSTEM FOR UTILIZING A TRANSMITTED SIGNAL COMPRISING A CARRIER FREQUENCY-MODULATED IN ACCORDANCE WITH THE MODULATION FUNCTION
Claim 2
Dependent Claim
23 words
A RECEIVER FOR A STEREO FM TRANSMISSION SYSTEM FOR UTILIZING A TRANSMITTED SIGNAL COMPRISING A CARRIER FREQUENCY-MODULATED IN ACCORDANCE WITH THE MODULATION FUNCTION
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-05-19 | 1967-11-18 | 1968-05-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-05-19 | 1971-11-18 | 1972-05-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-05-19 | 1975-11-18 | 1976-05-19 | $7700.00 | Window Closed / Lapsed |