US3299477A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for processing crushed fibrous stalks
Assignee: WR Grace and Co
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Filing: 1964-03-20
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Granted: 1967-01-24
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Expires: 1984-03-20
Abstract
No abstract record available.
Inventors
- 👤 Kenneth M Gunkel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 17:30
CPC Classifications
D; D01; D01B; D01B1/00; D01B1/10; D01B1/14; D01B1/28
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
72 words
AN APPARATUS FOR PROCESSING CRUSHED FIBROUS STALKS CONTAINING PITH TO SEPARATE THE PITH AND FIBERS COMPRISING (A) A ROTOR HAVING LATERALLY EXTENDING HAMMERS, (B) A SCREENING ELEMENT SUROUNDING THE ROTOR, AND HAVING AN OPEN INLET AND OUTLET ENDS, AND (C) A CASING MEANS SURROUNDING THE SCREENING ELEMENT FOR DIRECTING AIR AROUND THE OUTER SURFACE OF THE SCREENING ELEMENT AND HAVING OPPOSED, SPACED APART WALLS TERMINATING AT A SURFACE OF THE SCREENING ELEMENT.
Claim 2
Independent Claim
72 words
AN APPARATUS FOR PROCESSING CRUSHED FIBROUS STALKS CONTAINING PITH TO SEPARATE THE PITH AND FIBERS COMPRISING (A) A ROTOR HAVING LATERALLY EXTENDING HAMMERS, (B) A SCREENING ELEMENT SUROUNDING THE ROTOR, AND HAVING AN OPEN INLET AND OUTLET ENDS, AND (C) A CASING MEANS SURROUNDING THE SCREENING ELEMENT FOR DIRECTING AIR AROUND THE OUTER SURFACE OF THE SCREENING ELEMENT AND HAVING OPPOSED, SPACED APART WALLS TERMINATING AT A SURFACE OF THE SCREENING ELEMENT.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-01-23 | 1970-07-25 | 1971-01-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-01-23 | 1974-07-25 | 1975-01-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-01-23 | 1978-07-25 | 1979-01-24 | $7700.00 | Window Closed / Lapsed |