US2943271A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Carrier wave modulators and demodulators
Assignee: International Standard Electric Corp
•
Filing: 1957-10-28
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Granted: 1960-06-28
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Expires: 1977-10-28
Abstract
No abstract record available.
Inventors
- 👤 Willis John Gordon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 14:42
CPC Classifications
H; H04; H04L; H04L27/00; H04L27/18; H04L27/22; H04L27/233; H04L27/2334; H03; H03C; H03C1/00; H03C1/52; H03C1/54; H03C1/542; H03C1/545; H03C3/00; H03K; H03K7/00; H03K7/02; H04L27/20; H04L27/2032; H04L27/2035
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1998119A
Cited
GB504300A
Cited
GB521313A
Cited
US2304135A
Cited
US2691073A
Cited
US2816238A
Cited
US2862171A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-06-28 | 1963-12-28 | 1964-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-06-28 | 1967-12-28 | 1968-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-06-28 | 1971-12-28 | 1972-06-28 | $7700.00 | Window Closed / Lapsed |