Patent US2422204A successfully refreshed from Google Patents.
US2422204A
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Assignee: AT&T Inc
•
Filing: 1943-06-22
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Granted: 1947-06-17
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Expires: 1963-06-22
Abstract
No abstract record available.
Inventors
- 👤 Larned A Meacham
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 01:42
CPC Classifications
G; G01; G01S; G01S7/00; G01S7/02; G01S7/28; G01S7/282; G01S1/00; G01S1/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1592274A
Cited
US1924174A
Cited
US2092887A
Cited
US2189549A
Cited
US2241615A
Cited
US2255839A
Cited
US2324314A
Cited
GB552072A
Cited
US2332253A
Cited
US2318197A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-06-16 | 1950-12-16 | 1951-06-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-06-16 | 1954-12-16 | 1955-06-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-06-16 | 1958-12-16 | 1959-06-17 | $7700.00 | Window Closed / Lapsed |