Patent US3293552A successfully refreshed from Google Patents.
US3293552A
Expired / Lapsed
US
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Phase slope delay
Assignee: Communication Systems Inc
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Filing: 1964-02-13
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Granted: 1966-12-20
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Expires: 1984-02-13
Abstract
No abstract record available.
Inventors
- 👤 Sichak William
- 👤 Jack B Harvey
- 👤 Robert T Adams
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 23:05
CPC Classifications
H; H03; H03H; H03H11/00; H03H11/02; H03H11/26; H03H11/265; H03H7/00; H03H7/18
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
64 words
A CIRCUIT FOR DELAYING AN INCIDENT SIGNAL COMPRISING: MEANS FOR SLICING THE FREQUENCY SPECTRUM OF SAID SIGNAL INTO A PLURALITY OF BANDS; MEANS COUPLED TO SAID SLICING MEANS FOR ADDING A PHASE SHIFT TO EACH BAND PROPORTIONAL TO THE CENTER FREQUENCY THEREOF; AND MEANS COUPLED TO SAID ADDING MEANS FOR COMBINING THE PHASE SHIFTED BANDS AND PRODUCING A DELAYED REPLICA OF THE ORIGINAL SIGNAL.
Claim 2
Dependent Claim
64 words
A CIRCUIT FOR DELAYING AN INCIDENT SIGNAL COMPRISING: MEANS FOR SLICING THE FREQUENCY SPECTRUM OF SAID SIGNAL INTO A PLURALITY OF BANDS; MEANS COUPLED TO SAID SLICING MEANS FOR ADDING A PHASE SHIFT TO EACH BAND PROPORTIONAL TO THE CENTER FREQUENCY THEREOF; AND MEANS COUPLED TO SAID ADDING MEANS FOR COMBINING THE PHASE SHIFTED BANDS AND PRODUCING A DELAYED REPLICA OF THE ORIGINAL SIGNAL.
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) | 1969-12-19 | 1970-06-20 | 1970-12-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-12-19 | 1974-06-20 | 1974-12-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-12-19 | 1978-06-20 | 1978-12-20 | $7700.00 | Window Closed / Lapsed |