US3248469A
Expired / Lapsed
US
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High shear visbreaking method and apparatus
Assignee: Phillips Petroleum Co
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Filing: 1961-08-28
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Granted: 1966-04-26
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Expires: 1981-08-28
Abstract
No abstract record available.
Inventors
- 👤 Edward J Kosinsky
- 👤 Solop Eli
- 👤 Paul H Wagner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 06:29
CPC Classifications
C; C08; C08F; C08F8/00; C08F8/50; B; B29; B29C; B29C48/00; B29C48/25; B29C48/36; B29C48/375; B29C48/38; B29C48/395; B29C48/40; B29C48/435; B29C48/50; B29C48/505; B29C48/56; B29C48/64; B29C48/92; B29C2948/00; B29C2948/92; B29C2948/92504; B29C2948/92514; B29C2948/9258; B29C2948/9259; B29C2948/926; B29C2948/92704; B29C2948/92819; B29C2948/92857; B29C48/03; C08F2810/00; C08F2810/10
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
74 words
A METHOD OF VISBREAKING THERMOPLASTIC MATERIAL WITHOUT SUBJECTING THE SURFACE OF THE MATERIAL TO UNDESIRABLE ELEVATED TEMPERATURES WHICH COMPRISES PASSING SAID THERMOPLASTIC MATERIAL TO A SHEARING ZONE, CONTROLLING THE RATE OF INPUT OF SAID MATERIAL TO SAID SHEARING ZONE, SUBJECTING SAID MATERIAL TO HIGH SHEARING ACTION IN SAID SHEARING ZONE, PASSING THE MATERIAL THUS SHEARED TO AN EXTRUSION ZONE, EXTRUDING SAID SHEARED MATERIAL IN SAID EXTRUSION ZONE, AND CONTROLLING THE BACK PRESSURE ON SAID
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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) | 1969-04-25 | 1969-10-25 | 1970-04-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-04-25 | 1973-10-25 | 1974-04-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-04-25 | 1977-10-25 | 1978-04-26 | $7700.00 | Window Closed / Lapsed |