Patent US3490585A successfully refreshed from Google Patents.
US3490585A
Expired / Lapsed
US
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Process and apparatus for classifying fibres
Assignee: National Research Development Corp UK
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Filing: 1967-01-20
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Granted: 1970-01-20
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Expires: 1987-01-20
Abstract
No abstract record available.
Inventors
- 👤 Ronald William Gooding
- 👤 Noel James Parratt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 02:34
CPC Classifications
B; B07; B07C; B07C5/00; B07C5/04; B07C5/12; G; G01; G01N; G01N33/00; G01N33/36; G01N33/365
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
CA594371A
Cited
US693025A
Cited
US2748951A
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US2916142A
Cited
FR1161466A
Cited
US2942730A
Cited
US3067087A
Cited
US3145164A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-01-19 | 1973-07-21 | 1974-01-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-01-19 | 1977-07-21 | 1978-01-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-01-19 | 1981-07-21 | 1982-01-20 | $7700.00 | Window Closed / Lapsed |