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Patent US2974394A successfully refreshed from Google Patents.
US2974394A
Expired / Lapsed
US
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Machine for processing fibrous materials
Assignee: Individual
•
Filing: 1957-11-22
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Granted: 1961-03-14
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Expires: 1977-11-22
Abstract
No abstract record available.
Inventors
- 👤 Richard R Walton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 19:22
CPC Classifications
D; D06; D06C; D06C17/00; D04; D04H; D04H17/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US470496A
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US813656A
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US1533351A
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US2448441A
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US2438320A
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US2441390A
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US2496873A
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US2616154A
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US2890496A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-03-13 | 1964-09-12 | 1965-03-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-03-13 | 1968-09-12 | 1969-03-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-03-13 | 1972-09-12 | 1973-03-14 | $7700.00 | Window Closed / Lapsed |