Patent US3255277A successfully refreshed from Google Patents.
US3255277A
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US
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Method for extrusion of a graphite matrix containing coated particles
Assignee: Airco Inc
•
Filing: 1963-08-23
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Granted: 1966-06-07
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Expires: 1983-08-23
Abstract
No abstract record available.
Inventors
- 👤 Mark J Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 07:06
CPC Classifications
G; G21; G21C; G21C3/00; G21C3/42; G21C3/58; G21C3/62; G21C3/64; Y; Y02; Y02E; Y02E30/00; Y02E30/30
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
128 words
THE METHOD OF MOLDING OJF FINISHED LENGTH A ROD-LIKE ARTICLE COMPOSED OF PLASTIC MATRIX IN WHICH ARE DISTRIBUTED RELATIVELY BREAKABLE ELEMENTS WHICH HOWEVER ARE CAPABLE OF WITHSTANDING WITHOUT DAMAGE OR BREAKAGE A MOLDING TEMPERATURE AT WHICH THE PLASTIC MATRIX MATERIAL IS IN A PLIABLE STATE, SAID METHOD COMPRISING THE STEPS OF EXTRUDING FROM A MASS AT MOLDING TEMPERATURAE A LENGTH OF THE SAID MIXTURE SLIGHTLY LONGER THAN THE DESIRED FINISHED LENGTHS, PREFERENTIALLY RUPTURING THE EXTRUDING PORTION FROM THE MAIN MASS, WHEREBY THE EXTRUDED PORTION DETACHES FROM THE MAIN MASS SOLELY IN THE MATRIX MATERIAL WITHOUT RUPTURING ANY OF THE CONTAINED BREAKABLE ELEMENTS, AND MOLDING THE DETACHED PORTION TO THE DESIRED FINISHED LENGTH, THE SAID STEPS BEING CARRIED OUT WHILE THE PLASTIC MATRIX IS IN THE SAID PLIABLE STATE.
Claim 2
Independent Claim
128 words
THE METHOD OF MOLDING OJF FINISHED LENGTH A ROD-LIKE ARTICLE COMPOSED OF PLASTIC MATRIX IN WHICH ARE DISTRIBUTED RELATIVELY BREAKABLE ELEMENTS WHICH HOWEVER ARE CAPABLE OF WITHSTANDING WITHOUT DAMAGE OR BREAKAGE A MOLDING TEMPERATURE AT WHICH THE PLASTIC MATRIX MATERIAL IS IN A PLIABLE STATE, SAID METHOD COMPRISING THE STEPS OF EXTRUDING FROM A MASS AT MOLDING TEMPERATURAE A LENGTH OF THE SAID MIXTURE SLIGHTLY LONGER THAN THE DESIRED FINISHED LENGTHS, PREFERENTIALLY RUPTURING THE EXTRUDING PORTION FROM THE MAIN MASS, WHEREBY THE EXTRUDED PORTION DETACHES FROM THE MAIN MASS SOLELY IN THE MATRIX MATERIAL WITHOUT RUPTURING ANY OF THE CONTAINED BREAKABLE ELEMENTS, AND MOLDING THE DETACHED PORTION TO THE DESIRED FINISHED LENGTH, THE SAID STEPS BEING CARRIED OUT WHILE THE PLASTIC MATRIX IS IN THE SAID PLIABLE STATE.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-06-06 | 1969-12-06 | 1970-06-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-06-06 | 1973-12-06 | 1974-06-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-06-06 | 1977-12-06 | 1978-06-07 | $7700.00 | Window Closed / Lapsed |