US3041406A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Inward dialing to private branch exchange
Assignee: General Dynamics Corp
•
Filing: 1959-12-14
•
Granted: 1962-06-26
•
Expires: 1979-12-14
Abstract
No abstract record available.
Inventors
- 👤 George W Killian
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 07:41
CPC Classifications
H; H04; H04Q; H04Q3/00; H04Q3/58; H04Q3/62; H04Q3/625
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1627930A
Cited
US1441791A
Cited
US1627929A
Cited
USRE17526E
Cited
US1464118A
Cited
US1670252A
Cited
US1597032A
Cited
US1721748A
Cited
US1888337A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-06-25 | 1965-12-25 | 1966-06-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-06-25 | 1969-12-25 | 1970-06-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-06-25 | 1973-12-25 | 1974-06-26 | $7700.00 | Window Closed / Lapsed |