US2582327A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for powdering polyethylene
Assignee: Union Carbide Corp
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Filing: 1949-07-23
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Granted: 1952-01-15
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Expires: 1969-07-23
Abstract
No abstract record available.
Inventors
- 👤 Walter A Haine
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:09
CPC Classifications
C; C08; C08J; C08J3/00; C08J3/12; B; B29; B29B; B29B13/00; B29B13/10; C08J2323/00; C08J2323/02; C08J2323/04; C08J2323/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
85 words
A PROCESS FOR POWDERING POLYETHYLENE WHICH COMPRISES HEATING SAID MATERIAL TO ITS SOFTENING TEMPERATURE, MECHANICALLY WORKING INTO AND DISTRIBUTING TROUGHOUT THE SOFTENED MATERIAL A NON-SOLVENT COOLING LIQUID WHICH IS INERT TO THE MATERIAL, REDUCING THE TEMPERATURE OF SAID MATERIAL TO BELOW THAT AT WHICH SAID MATERIAL IS RESILIENT, AND MECHANICALLY SHREDDING AND BREAKING UP SAID MATERIAL IN THE PRESENCE OF THE SAID LIQUID TO FORM ELONGATED, FIBROUS-APPEARING, FEATHERY PARTICLES, AT SUCH REDUCED TEMPERATURE, WHEREBY SAID LIQUID AT LEAST TO SOME EXTENT LUBRICATES THE SHREDDING OPERATION.
Claim 2
Dependent Claim
85 words
A PROCESS FOR POWDERING POLYETHYLENE WHICH COMPRISES HEATING SAID MATERIAL TO ITS SOFTENING TEMPERATURE, MECHANICALLY WORKING INTO AND DISTRIBUTING TROUGHOUT THE SOFTENED MATERIAL A NON-SOLVENT COOLING LIQUID WHICH IS INERT TO THE MATERIAL, REDUCING THE TEMPERATURE OF SAID MATERIAL TO BELOW THAT AT WHICH SAID MATERIAL IS RESILIENT, AND MECHANICALLY SHREDDING AND BREAKING UP SAID MATERIAL IN THE PRESENCE OF THE SAID LIQUID TO FORM ELONGATED, FIBROUS-APPEARING, FEATHERY PARTICLES, AT SUCH REDUCED TEMPERATURE, WHEREBY SAID LIQUID AT LEAST TO SOME EXTENT LUBRICATES THE SHREDDING OPERATION.
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) | 1955-01-14 | 1955-07-16 | 1956-01-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-01-14 | 1959-07-16 | 1960-01-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-01-14 | 1963-07-16 | 1964-01-15 | $7700.00 | Window Closed / Lapsed |