US2581657A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Focusing and centering device for cathode-ray tubes
Assignee: Individual
•
Filing: 1950-07-26
•
Granted: 1952-01-08
•
Expires: 1970-07-26
Abstract
No abstract record available.
Inventors
- 👤 Myron R Heppner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 23:06
CPC Classifications
H; H01; H01J; H01J29/00; H01J29/46
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2336837A
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GB521439A
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US2234720A
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US2431077A
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US2442975A
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US2416687A
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US2418487A
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US2433682A
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GB597255A
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GB615553A
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US2533687A
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US2533688A
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US2533689A
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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) | 1955-01-07 | 1955-07-09 | 1956-01-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-01-07 | 1959-07-09 | 1960-01-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-01-07 | 1963-07-09 | 1964-01-08 | $7700.00 | Window Closed / Lapsed |