US2421735A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of electrolytically reproducing prints or designs
Assignee: Individual
•
Filing: 1941-12-22
•
Granted: 1947-06-03
•
Expires: 1961-12-22
Abstract
No abstract record available.
Inventors
- 👤 Clarence O Prest
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 07:49
CPC Classifications
B; B41; B41M; B41M5/00; B41M5/20
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US238931A
Cited
US100580A
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US670510A
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GB189825292A
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US1550048A
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US1697932A
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US1844928A
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US1739657A
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US1844199A
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US1902213A
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US1880449A
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US2012270A
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US2125037A
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GB483503A
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US2281013A
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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) | 1950-06-02 | 1950-12-02 | 1951-06-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-06-02 | 1954-12-02 | 1955-06-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-06-02 | 1958-12-02 | 1959-06-03 | $7700.00 | Window Closed / Lapsed |