Patent US2790638A successfully refreshed from Google Patents.
US2790638A
Expired / Lapsed
US
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Air blast strip feeding means
Assignee: Unisys Corp
•
Filing: 1952-05-01
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Granted: 1957-04-30
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Expires: 1972-05-01
Abstract
No abstract record available.
Inventors
- 👤 Wockenfuss William
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 06:56
CPC Classifications
B; B65; B65H; B65H23/00; B65H23/04; B65H23/24; B41; B41L; B41L1/00; B65H2701/00; B65H2701/10; B65H2701/11; B65H2701/112; B65H2701/1123; B65H2701/11231
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US366893A
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US378266A
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US1161346A
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US1556057A
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US2000100A
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US2037806A
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US2077428A
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US2075993A
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US2364087A
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US2391760A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-04-29 | 1960-10-29 | 1961-04-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-04-29 | 1964-10-29 | 1965-04-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-04-29 | 1968-10-29 | 1969-04-30 | $7700.00 | Window Closed / Lapsed |