US2522078A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Translucent recording medium
Assignee: Individual
•
Filing: 1945-02-03
•
Granted: 1950-09-12
•
Expires: 1965-02-03
Abstract
No abstract record available.
Inventors
- 👤 Joseph B Walker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:55
CPC Classifications
G; G11; G11B; G11B11/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2040693A
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US1919116A
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US2086934A
Cited
US2032741A
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US2093215A
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US2163087A
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US2224170A
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US2273916A
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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) | 1953-09-11 | 1954-03-13 | 1954-09-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-09-11 | 1958-03-13 | 1958-09-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-09-11 | 1962-03-13 | 1962-09-12 | $7700.00 | Window Closed / Lapsed |