US2866008A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Testing apparatus for calling line identifiers
Assignee: General Telephone Laboratories Inc
•
Filing: 1955-02-28
•
Granted: 1958-12-23
•
Expires: 1975-02-28
Abstract
No abstract record available.
Inventors
- 👤 Thomas G Walsh
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 07:37
CPC Classifications
H; H04; H04M; H04M15/00; H04M15/08; H04M3/00; H04M3/22; H04M3/26; H04M3/28; H04M3/32; H04M3/323
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1688993A
Cited
US2102769A
Cited
US2351551A
Cited
US2619545A
Cited
US2672515A
Cited
US2672520A
Cited
US2782257A
Cited
US2724020A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-12-22 | 1962-06-23 | 1962-12-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-12-22 | 1966-06-23 | 1966-12-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-12-22 | 1970-06-23 | 1970-12-23 | $7700.00 | Window Closed / Lapsed |