Patent US3873956A successfully refreshed from Google Patents.
US3061685A
Expired / Lapsed
US
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Electronic switching telephone system
Assignee: General Dynamics Corp
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Filing: 1958-09-15
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Granted: 1962-10-30
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Expires: 1978-09-15
Abstract
No abstract record available.
Inventors
- 👤 John A Peach
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 21:57
CPC Classifications
H; H04; H04Q; H04Q11/00; H04Q11/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2741663A
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US2934606A
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US2857463A
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US2882341A
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US2953749A
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US2830124A
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US2863001A
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US2938961A
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US2947819A
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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) | 1965-10-29 | 1966-04-30 | 1966-10-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-10-29 | 1970-04-30 | 1970-10-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-10-29 | 1974-04-30 | 1974-10-30 | $7700.00 | Window Closed / Lapsed |