Patent US2601403A successfully refreshed from Google Patents.
US2601403A
Expired / Lapsed
US
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Electric circuit
Assignee: AT&T Inc
•
Filing: 1948-03-19
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Granted: 1952-06-24
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Expires: 1968-03-19
Abstract
No abstract record available.
Inventors
- 👤 Lester Y Lacy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 09:04
CPC Classifications
H; H04; H04Q; H04Q1/00; H04Q1/18; H04Q1/20; H03; H03K; H03K21/00
Claims Analysis
Total Claims: 0
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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) | 1955-06-24 | 1955-12-24 | 1956-06-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-06-24 | 1959-12-24 | 1960-06-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-06-24 | 1963-12-24 | 1964-06-24 | $7700.00 | Window Closed / Lapsed |