Patent US2574580A successfully refreshed from Google Patents.
US2574580A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Drive control system for felt production
Assignee: American Hair & Felt Co
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Filing: 1950-05-04
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Granted: 1951-11-13
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Expires: 1970-05-04
Abstract
No abstract record available.
Inventors
- 👤 Neil S Mckay
- 👤 Arthur L Clements
- 👤 Frederick J Hicks
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 06:49
CPC Classifications
D; D04; D04H; D04H1/00; D04H1/70; D04H1/74
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US390923A
Cited
US1510236A
Cited
US1620307A
Cited
US1859838A
Cited
US2004709A
Cited
US2407548A
Cited
US2428709A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-11-12 | 1955-05-14 | 1955-11-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-11-12 | 1959-05-14 | 1959-11-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-11-12 | 1963-05-14 | 1963-11-13 | $7700.00 | Window Closed / Lapsed |