Patent US6011973A successfully refreshed from Google Patents.
Patent US2633797A successfully refreshed from Google Patents.
US2633797A
Expired / Lapsed
US
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Pneumatic sheet feeder for printing presses
Assignee: Individual
•
Filing: 1948-03-19
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Granted: 1953-04-07
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Expires: 1968-03-19
Abstract
No abstract record available.
Inventors
- 👤 Ralph T Larson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 16:30
CPC Classifications
B; B65; B65H; B65H3/00; B65H3/08; B65H3/0808; B65H3/0816; B65H5/00; B65H5/22; B65H5/228; Y; Y10; Y10S; Y10S271/00; Y10S271/902
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1621546A
Cited
US1236178A
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US1468289A
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US1538092A
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US1547724A
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US1668154A
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US1836536A
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US2091322A
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US2205720A
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US2206620A
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US2251122A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-04-06 | 1956-10-06 | 1957-04-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-04-06 | 1960-10-06 | 1961-04-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-04-06 | 1964-10-06 | 1965-04-07 | $7700.00 | Window Closed / Lapsed |