US3226481A
Expired / Lapsed
US
⏱️ 0.0 years remaining
F.m. sum and difference stereo receiver having compensation means
Assignee: Lanteris Space LLC
•
Filing: 1962-09-07
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Granted: 1965-12-28
•
Expires: 1982-09-07
Abstract
No abstract record available.
Inventors
- 👤 Jr Harry H Wilson
- 👤 Hopengarten Abram
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 21:35
CPC Classifications
H; H03; H03D; H03D1/00; H03D1/22; H03D1/2209; H03D1/2218
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3087993A
Cited
US3123673A
Cited
US3133993A
Cited
US3099707A
Cited
US3070662A
Cited
US3124653A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-12-27 | 1969-06-28 | 1969-12-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-12-27 | 1973-06-28 | 1973-12-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-12-27 | 1977-06-28 | 1977-12-28 | $7700.00 | Window Closed / Lapsed |