Patent US3430009A successfully refreshed from Google Patents.
US3430009A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Service observing system
Assignee: Bell Telephone Company of Canada
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Filing: 1965-10-22
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Granted: 1969-02-25
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Expires: 1985-10-22
Abstract
No abstract record available.
Inventors
- 👤 Laurent J Fontaine
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 20:10
CPC Classifications
H; H04; H04M; H04M3/00; H04M3/22; H04M3/36
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
83 words
A TELEPHONE SERVICE OBSERVING SYSTEM FOR INDICATING THE QUALITY OF TRANSMISSION OVER A TELEPHONE LINE COMPRISING: (A) A METER HAVING A NEEDLE MOVABLE IN RESPONSE TO TRANSMISSION OVER THE TELEPHONE LINE; (B) LIGHT SENSITIVE MEANS POSITIONED IN THE PATH OF SAID NEEDLE TO A POINT CORRESPONDING TO A PARTICULAR QUALITY OF TRANSMISSION; AND (C) MEANS RESPONSIVE TO A PREDETERMINED NUMBER OF PASSAGES OF SAID NEEDLE BY THE LIGHT SENSITIVE MEANS DURING A PREDETERMINED PERIOD OF TIME FOR INDICATING SAID PARTICULAR QUALITY OF TRANSMISSION.
Claim 2
Dependent Claim
83 words
A TELEPHONE SERVICE OBSERVING SYSTEM FOR INDICATING THE QUALITY OF TRANSMISSION OVER A TELEPHONE LINE COMPRISING: (A) A METER HAVING A NEEDLE MOVABLE IN RESPONSE TO TRANSMISSION OVER THE TELEPHONE LINE; (B) LIGHT SENSITIVE MEANS POSITIONED IN THE PATH OF SAID NEEDLE TO A POINT CORRESPONDING TO A PARTICULAR QUALITY OF TRANSMISSION; AND (C) MEANS RESPONSIVE TO A PREDETERMINED NUMBER OF PASSAGES OF SAID NEEDLE BY THE LIGHT SENSITIVE MEANS DURING A PREDETERMINED PERIOD OF TIME FOR INDICATING SAID PARTICULAR QUALITY OF TRANSMISSION.
References Cited (Backward Citations)
US2066942A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-02-25 | 1972-08-26 | 1973-02-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-02-25 | 1976-08-26 | 1977-02-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-02-25 | 1980-08-26 | 1981-02-25 | $7700.00 | Window Closed / Lapsed |