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Patent US2621374A successfully refreshed from Google Patents.
US2621374A
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Top roll fiber attenuating apparatus
Assignee: PREC ROLLS Inc
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Filing: 1950-10-11
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Granted: 1952-12-16
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Expires: 1970-10-11
Abstract
No abstract record available.
Inventors
- 👤 Edwin P Waite
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 15:52
CPC Classifications
D; D01; D01H; D01H5/00; D01H5/18; D01H5/70; D01H5/74; D01H2700/00; D01H2700/245
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1300590A
Cited
US1583276A
Cited
FR870115A
Cited
US2352167A
Cited
US2387703A
Cited
US2355511A
Cited
US2412357A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-12-16 | 1956-06-16 | 1956-12-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-12-16 | 1960-06-16 | 1960-12-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-12-16 | 1964-06-16 | 1964-12-16 | $7700.00 | Window Closed / Lapsed |