Patent US2546814A successfully refreshed from Google Patents.
US2546814A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Indicating apparatus
Assignee: AT&T Inc
•
Filing: 1947-09-05
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Granted: 1951-03-27
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Expires: 1967-09-05
Abstract
No abstract record available.
Inventors
- 👤 Herbert W Augustadt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 11:30
CPC Classifications
G; G01; G01S; G01S1/00; G01S1/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2421606A
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US2454782A
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US2424999A
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US2414477A
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US2417522A
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US2418364A
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US2420211A
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US2419772A
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US2434264A
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US2448363A
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US2496970A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-03-26 | 1954-09-25 | 1955-03-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-03-26 | 1958-09-25 | 1959-03-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-03-26 | 1962-09-25 | 1963-03-27 | $7700.00 | Window Closed / Lapsed |