US3531774A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for selectively evaluating pulse images in superheterodyne ripple-control receivers
Assignee: Zellweger Uster AG
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Filing: 1966-11-04
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Granted: 1970-09-29
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Expires: 1986-11-04
Abstract
No abstract record available.
Inventors
- 👤 Eduard Baumann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 23:06
CPC Classifications
H; H02; H02J; H02J13/00; H02J13/13; H02J13/1311; H02J13/1313; Y; Y02; Y02B; Y02B90/00; Y02B90/20; Y02E; Y02E60/00; Y04; Y04S; Y04S40/00; Y04S40/12; Y04S40/121
Claims Analysis
Total Claims: 0
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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) | 1973-09-28 | 1974-03-30 | 1974-09-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-09-28 | 1978-03-30 | 1978-09-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-09-28 | 1982-03-30 | 1982-09-29 | $7700.00 | Window Closed / Lapsed |