Patent US3153232A successfully refreshed from Google Patents.
US3153232A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Station-keeping radar system
Assignee: Sierra Research Corp
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Filing: 1960-09-26
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Granted: 1964-10-13
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Expires: 1980-09-26
Abstract
No abstract record available.
Inventors
- 👤 Harold K Fletcher
- 👤 John P Chisholm
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 08:28
CPC Classifications
G; G01; G01S; G01S1/00; G01S1/02; G01S13/00; G01S13/74; G01S13/76; G01S13/78; G01S13/87; G01S13/88; G01S13/93; G01S13/933; G01S7/00; G01S7/02; G01S7/28; G01S7/285; G01S7/292; G01S7/2923; G01S7/2927; G01S7/34
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
130 words
A TIME-DIVISION MULTIPLEX SYSTEM OF RADAR UNITS OPERATING IN UNIQUELY ASSIGNED TIME SLOTS FORMING A REPEATING TIME SEQUENCE, EACH UNIT HAVING A RECEIVER AND A TRANSMITTER STANDING READY TO PERFORM A BEACON TRANSPONDER FUNCTION WHEN INTERROGATED BY ANOTHER UNIT DURING A TIME SLOT ASSIGNED THERETO AND EACH UNIT PERFORMING A PULSE-ECHO FUNCTION DURING ITS OWN TIME SLOT, SAID SYSTEM COMPRISING ACCURATELY SYNCHRONIZED TIME CLOCK MEANS IN SAID UNITS AND INITIATING THE RADAR FUNCTION OF EACH UNIT DURING ITS OWN TIME SLOT; GATED MEANS FOR INITIATING A BEACON REPLY PULSE FROM THE TRANSMITTER IN RESPONSE TO AN INTERROGATING PULSE ARRIVING AT THE RECEIVER FROM ANOTHER UNIT; AND CONTROL MEANS CONNECTED WITH SAID GATED MEANS FOR RENDERING THE LATTER RESPONSIVE ONLY TO PULSES RECEIVED DURING THE TIME SLOTS OF THE OTHER UNITS.
Claim 2
Dependent Claim
130 words
A TIME-DIVISION MULTIPLEX SYSTEM OF RADAR UNITS OPERATING IN UNIQUELY ASSIGNED TIME SLOTS FORMING A REPEATING TIME SEQUENCE, EACH UNIT HAVING A RECEIVER AND A TRANSMITTER STANDING READY TO PERFORM A BEACON TRANSPONDER FUNCTION WHEN INTERROGATED BY ANOTHER UNIT DURING A TIME SLOT ASSIGNED THERETO AND EACH UNIT PERFORMING A PULSE-ECHO FUNCTION DURING ITS OWN TIME SLOT, SAID SYSTEM COMPRISING ACCURATELY SYNCHRONIZED TIME CLOCK MEANS IN SAID UNITS AND INITIATING THE RADAR FUNCTION OF EACH UNIT DURING ITS OWN TIME SLOT; GATED MEANS FOR INITIATING A BEACON REPLY PULSE FROM THE TRANSMITTER IN RESPONSE TO AN INTERROGATING PULSE ARRIVING AT THE RECEIVER FROM ANOTHER UNIT; AND CONTROL MEANS CONNECTED WITH SAID GATED MEANS FOR RENDERING THE LATTER RESPONSIVE ONLY TO PULSES RECEIVED DURING THE TIME SLOTS OF THE OTHER UNITS.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-10-13 | 1968-04-13 | 1968-10-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-10-13 | 1972-04-13 | 1972-10-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-10-13 | 1976-04-13 | 1976-10-13 | $7700.00 | Window Closed / Lapsed |