Patent US2604607A successfully refreshed from Google Patents.
US2604607A
Expired / Lapsed
US
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Three-dimensional indicator tube and circuit therefor
Assignee: Individual
•
Filing: 1945-11-28
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Granted: 1952-07-22
•
Expires: 1965-11-28
Abstract
No abstract record available.
Inventors
- 👤 Fred S Howell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:15
CPC Classifications
G; G01; G01S; G01S7/00; G01S7/02; G01S7/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2030492A
Cited
US2213070A
Cited
US2175702A
Cited
US2291965A
Cited
US2280191A
Cited
US2543793A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-07-22 | 1956-01-21 | 1956-07-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-07-22 | 1960-01-21 | 1960-07-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-07-22 | 1964-01-21 | 1964-07-22 | $7700.00 | Window Closed / Lapsed |