US3475561A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Telephone carrier system having selfcontained independently attachable line tap units
Assignee: Superior Continental Corp
•
Filing: 1965-09-29
•
Granted: 1969-10-28
•
Expires: 1985-09-29
Abstract
No abstract record available.
Inventors
- 👤 Lester Q Krasin
- 👤 Clifford E Greene
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:41
CPC Classifications
H; H04; H04M; H04M7/00; H04M7/16
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US3278850A
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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) | 1972-10-27 | 1973-04-28 | 1973-10-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-10-27 | 1977-04-28 | 1977-10-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-10-27 | 1981-04-28 | 1981-10-28 | $7700.00 | Window Closed / Lapsed |