US3036159A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Telephone identification system
Assignee: Individual
•
Filing: 1954-06-24
•
Granted: 1962-05-22
•
Expires: 1974-06-24
Abstract
No abstract record available.
Inventors
- 👤 Ralph D Collins
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 10:25
CPC Classifications
H; H04; H04M; H04M15/00; H04M15/36
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1864524A
Cited
US2228113A
Cited
US2281508A
Cited
US2283610A
Cited
US2562594A
Cited
US2717279A
Cited
US2782259A
Cited
US2889410A
Cited
GB777099A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-05-21 | 1965-11-20 | 1966-05-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-05-21 | 1969-11-20 | 1970-05-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-05-21 | 1973-11-20 | 1974-05-22 | $7700.00 | Window Closed / Lapsed |