US2674943A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Proof press
Assignee: Challenge Machinery Co
•
Filing: 1948-07-26
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Granted: 1954-04-13
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Expires: 1968-07-26
Abstract
No abstract record available.
Inventors
- 👤 Barney Freeman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 04:01
CPC Classifications
B; B41; B41F; B41F3/00; B41F3/18; B41F3/28
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-04-12 | 1957-10-12 | 1958-04-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-04-12 | 1961-10-12 | 1962-04-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-04-12 | 1965-10-12 | 1966-04-13 | $7700.00 | Window Closed / Lapsed |