Patent US2809400A successfully refreshed from Google Patents.
US2809400A
Expired / Lapsed
US
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Apparatus for producing feather fibres
Assignee: FYBRADOWN Corp
•
Filing: 1954-07-23
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Granted: 1957-10-15
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Expires: 1974-07-23
Abstract
No abstract record available.
Inventors
- 👤 Martin S Maltenfort
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 00:10
CPC Classifications
B; B02; B02C; B02C13/00; B02C13/26; D; D21; D21B; D21B1/00; D21B1/04; D21B1/12
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1419089A
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US1397828A
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US1620303A
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US1707697A
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US1828490A
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US2172096A
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US2367179A
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US2532660A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-10-14 | 1961-04-15 | 1961-10-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-10-14 | 1965-04-15 | 1965-10-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-10-14 | 1969-04-15 | 1969-10-15 | $7700.00 | Window Closed / Lapsed |