USRE28337E
Expired / Lapsed
US
⏱️ 0.0 years remaining
Telephone switching system with programmed auxiliary control for providing special services
Assignee: —
•
Filing: 1974-02-22
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Granted: 1975-02-11
•
Expires: 1994-02-22
Abstract
Abstract 1. A TELEPHONE SWITCHING SYSTEM COMPRISING: (A) TRANSMISSION PATHS; (B) FIRST SWITCHING MEANS FOR INTERCONNECTING THE TRANMISSION PATHS; (C) A COMMON CONTROLLING MEANS CONNECTED TO THE SWITCHING MEANS FOR CONTROLLING THE OPERATION OF THE SWITCHING MEANS; AND (D) PROGRAMMED CONTROLLING MEANS CONNECTED TO AND ACTING IN CONSORT WITH THE COMMON CONTROLLING MEANS, FOR MODIFYING THE SEQUENCE OF OPERATION THEREOF IN A PROGRAM RESPONSIVE MANNER, IN RESPONSE TO A REQUEST BY THE COMMON CONTROLLING MEANS FOR SUCH CONNECTION, UPON RECOGNITION BY THE COMMON CONTROLLING MEANS OF ITS INABILITY TO PROCESS A REQUEST FOR SERVICE FROM ONE OF THE TRANSMISSION PATHS WITHOUT SUCH CONNECTION.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 02:23
CPC Classifications
H; H04; H04Q; H04Q3/00; H04Q3/42; H04Q3/54; H04Q3/545; H04Q3/54508; H04Q3/54525
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-02-10 | 1978-08-12 | 1979-02-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-02-10 | 1982-08-12 | 1983-02-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-02-10 | 1986-08-12 | 1987-02-11 | $7700.00 | Window Closed / Lapsed |