US2448659A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for winding hectograph rolls evenly
Assignee: Ditto Inc
•
Filing: 1944-04-26
•
Granted: 1948-09-07
•
Expires: 1964-04-26
Abstract
No abstract record available.
Inventors
- 👤 William J Champion
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 05:44
CPC Classifications
B; B41; B41L; B41L9/00; B41L9/04; B41L9/08
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US553045A
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US584787A
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US1348242A
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US1387764A
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US1538399A
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GB205515A
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US1491509A
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US1949154A
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US2137096A
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US2220265A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-09-07 | 1952-03-08 | 1952-09-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-09-07 | 1956-03-08 | 1956-09-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-09-07 | 1960-03-08 | 1960-09-07 | $7700.00 | Window Closed / Lapsed |