US2885737A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manufacture of high frequency cable
Assignee: Anaconda Wire and Cable Co
•
Filing: 1954-05-24
•
Granted: 1959-05-12
•
Expires: 1974-05-24
Abstract
No abstract record available.
Inventors
- 👤 Whalen Richard Thomas
- 👤 D Ascoli Ralph Gregory
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 18:28
CPC Classifications
B; B29; B29C; B29C44/00; B29C44/20; B29C44/32; B29C44/322; Y; Y10; Y10S; Y10S264/00; Y10S264/42
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
126 words
IN THE METHOD OF FORMING AN INSULATED LAYER OF CELLULAR POLYETHYLENE ABOUT A WIRE IN WHICH A CONFINED MIXTURE OF POLYETHYLENE AND A BLOWING AGENT IS HEATED TO AN ELEVATED TEMPERATURE AT WHICH THE POLYETHYLENE FLOWS READILY UNDER PRESSURE AND THE BLOWING AGENT SUBSTANTIALLY COMPLETELY DECOMPOSES, THE MIXTURE IS MAINTAINED UNDER PRESSURE SUFFICIENT TO PREVENT SUBSTANTIAL EXPANSION THEREOF AS A RESULT OF THE DECOMPOSITION OF THE BLOWING AGENT AND THE MIXTURE IS EXTRUDED ABOUT A WIRE AND THEN PERMITTED TO EXPAND; THE IMPROVEMENT IN WHICH THE MIXTURE IS MAINTAINED UNDER SAID PRESSURE, IN PART, BY COOLING THE PORTION THEREOF ABOUT TO BE EXTRUDED PRIOR TO ITS EXTRUSION TO REDUCE ITS FLOWABILITY AND TO INCREASE ITS RESISTANCE TO EXTRUSION SUFFICIENTLY TO BUILD UP THE NECESSARY BACK PRESSURE.
Claim 2
Dependent Claim
126 words
IN THE METHOD OF FORMING AN INSULATED LAYER OF CELLULAR POLYETHYLENE ABOUT A WIRE IN WHICH A CONFINED MIXTURE OF POLYETHYLENE AND A BLOWING AGENT IS HEATED TO AN ELEVATED TEMPERATURE AT WHICH THE POLYETHYLENE FLOWS READILY UNDER PRESSURE AND THE BLOWING AGENT SUBSTANTIALLY COMPLETELY DECOMPOSES, THE MIXTURE IS MAINTAINED UNDER PRESSURE SUFFICIENT TO PREVENT SUBSTANTIAL EXPANSION THEREOF AS A RESULT OF THE DECOMPOSITION OF THE BLOWING AGENT AND THE MIXTURE IS EXTRUDED ABOUT A WIRE AND THEN PERMITTED TO EXPAND; THE IMPROVEMENT IN WHICH THE MIXTURE IS MAINTAINED UNDER SAID PRESSURE, IN PART, BY COOLING THE PORTION THEREOF ABOUT TO BE EXTRUDED PRIOR TO ITS EXTRUSION TO REDUCE ITS FLOWABILITY AND TO INCREASE ITS RESISTANCE TO EXTRUSION SUFFICIENTLY TO BUILD UP THE NECESSARY BACK PRESSURE.
References Cited (Backward Citations)
US2736064A
Cited
US1370800A
Cited
US1455946A
Cited
US2358963A
Cited
US2256483A
Cited
US2508988A
Cited
GB629668A
Cited
US2766481A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-05-11 | 1962-11-10 | 1963-05-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-05-11 | 1966-11-10 | 1967-05-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-05-11 | 1970-11-10 | 1971-05-12 | $7700.00 | Window Closed / Lapsed |