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US2427019A
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Indicator operating mechanism
Assignee: AT&T Inc
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Filing: 1946-04-06
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Granted: 1947-09-09
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Expires: 1966-04-06
Abstract
No abstract record available.
Inventors
- 👤 Charles W Norwood
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 13:45
CPC Classifications
F; F41; F41G; F41G3/00; F41G3/14
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2383365A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-09-08 | 1951-03-10 | 1951-09-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-09-08 | 1955-03-10 | 1955-09-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-09-08 | 1959-03-10 | 1959-09-09 | $7700.00 | Window Closed / Lapsed |