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Patent US2921515A successfully refreshed from Google Patents.
US2921515A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Machines for issuing business forms
Assignee: Unisys Corp
•
Filing: 1956-02-14
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Granted: 1960-01-19
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Expires: 1976-02-14
Abstract
No abstract record available.
Inventors
- 👤 Richard I N Weingart
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 12:56
CPC Classifications
B; B41; B41F; B41F17/00; B41F17/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2160539A
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US2601283A
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US2609746A
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US1056765A
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US1117179A
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US1037463A
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US1169590A
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US1595519A
Cited
US1832007A
Cited
US2035095A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-01-18 | 1963-07-20 | 1964-01-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-01-18 | 1967-07-20 | 1968-01-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-01-18 | 1971-07-20 | 1972-01-19 | $7700.00 | Window Closed / Lapsed |