Patent US3171108A successfully refreshed from Google Patents.
US3171108A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Valuable protection system
Assignee: Individual
•
Filing: 1960-11-23
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Granted: 1965-02-23
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Expires: 1980-11-23
Abstract
No abstract record available.
Inventors
- 👤 Mackeen John Crerar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:32
CPC Classifications
G; G08; G08B; G08B26/00; G08B26/001; G08B26/003
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
100 words
A SYSTEM FOR INDICATING AT A REMOTE LOCATION THE PRESENCE OF AN ALARM CONDITION IN AN AREA SAID SYSTEM COMPRISING, AN INTERROGATOR ADAPTED TO INTERROGATE A RESPONSOR LOCATED ADJACENT SAID AREA AT PREDETERMINED TIME INTERVALS, MEANS WITHIN SAID RESPONSOR ADAPTED TO GENERATE A FIRST CODED SIGNAL IN A RESPONSE TO AN INTERROGATION FROM SAID INTERROGATOR AND TO ALTER SAID RESPONSE AFTER EACH INTERROGATION, AT LEAST ONE ALARM UNIT POSITIONED ADJACENT OR IN SAID AREA AND CONNECTED TO SAID RESPONSOR, MEANS IN SAID INTERROGATOR ADAPTED TO GENERATE A SECOND CODED SIGNAL AND TO ALTER SAID SECOND CODED SIGNAL AFTER EACH INTERROGA-
Claim 2
Independent Claim
100 words
A SYSTEM FOR INDICATING AT A REMOTE LOCATION THE PRESENCE OF AN ALARM CONDITION IN AN AREA SAID SYSTEM COMPRISING, AN INTERROGATOR ADAPTED TO INTERROGATE A RESPONSOR LOCATED ADJACENT SAID AREA AT PREDETERMINED TIME INTERVALS, MEANS WITHIN SAID RESPONSOR ADAPTED TO GENERATE A FIRST CODED SIGNAL IN A RESPONSE TO AN INTERROGATION FROM SAID INTERROGATOR AND TO ALTER SAID RESPONSE AFTER EACH INTERROGATION, AT LEAST ONE ALARM UNIT POSITIONED ADJACENT OR IN SAID AREA AND CONNECTED TO SAID RESPONSOR, MEANS IN SAID INTERROGATOR ADAPTED TO GENERATE A SECOND CODED SIGNAL AND TO ALTER SAID SECOND CODED SIGNAL AFTER EACH INTERROGA-
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-02-23 | 1968-08-24 | 1969-02-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-02-23 | 1972-08-24 | 1973-02-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-02-23 | 1976-08-24 | 1977-02-23 | $7700.00 | Window Closed / Lapsed |