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US2452235A
Expired / Lapsed
US
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Blackboard
Assignee: Milprint Inc
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Filing: 1946-03-02
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Granted: 1948-10-26
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Expires: 1966-03-02
Abstract
No abstract record available.
Inventors
- 👤 Leon J Gold
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 19:35
CPC Classifications
B; B44; B44D; B44D3/00; B44D3/18; B43; B43L; B43L1/00; B43L1/04; B43L1/10; D; D21; D21J; D21J1/00; D21J1/08
Claims Analysis
Total Claims: 0
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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) | 1951-10-26 | 1952-04-26 | 1952-10-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-10-26 | 1956-04-26 | 1956-10-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-10-26 | 1960-04-26 | 1960-10-26 | $7700.00 | Window Closed / Lapsed |