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US2670971A
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Flexible record protective recording media
Assignee: Individual
•
Filing: 1951-03-23
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Granted: 1954-03-02
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Expires: 1971-03-23
Abstract
No abstract record available.
Inventors
- 👤 Ervin G Johnson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 20:38
CPC Classifications
B; B41; B41M; B41M5/00; B41M5/124; G; G09; G09F; G09F3/00; G09F3/08; G09F3/10; G09F3/02; G09F2003/023; G09F2003/0257; G09F2003/0261
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1207814A
Cited
GB234855A
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US2093086A
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GB467091A
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US2322640A
Cited
GB528680A
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US2364001A
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US2520077A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-03-01 | 1957-08-31 | 1958-03-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-03-01 | 1961-08-31 | 1962-03-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-03-01 | 1965-08-31 | 1966-03-02 | $7700.00 | Window Closed / Lapsed |