Patent US3420720A successfully refreshed from Google Patents.
US3420720A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making jacketed multi-conduction electrical cable
Assignee: BARCLAYSAMERICAN/BUSINESS CREDIT Inc
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Filing: 1963-11-08
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Granted: 1969-01-07
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Expires: 1983-11-08
Abstract
No abstract record available.
Inventors
- 👤 Robert C Hillman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 15:44
CPC Classifications
H; H01; H01B; H01B13/00; H01B13/06; H01B13/14; B; B29; B29C; B29C48/00; B29C48/15; H01B13/22; H01B13/26; H01B3/00; H01B3/18; H01B3/30; H01B3/42; B29C48/03; B29C48/05; B29C48/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
129 words
A METHOD OF FORMING MULTI-CONDUCTOR CABLES HAVING A CABLE CORE CONSISTING OF A PLURALITY OF INSULATED CONDUCTORS, SAID METHOD COMPRISING THE STEPS OF A. SPIRALLY WRAPPING THE CABLE CORE WITH A STRIP OF TEREPHTHALATE POLYESTER, (1) THE LONGITUDINAL EDGES OF THE STRIP OVERLAPPING ONE ANOTHER TO COMPLETELY COVER THE CABLE CORE, B. PASSING THE WRAPPED CABLE CORE THROUGH A HEATED CHAMBER (1) TO HEAT THE TEREPHTHALATE POLYESTER STRIP TO A TEMPERATURE OF 120* TO 150*F., (2) WHEREBY SHRINKAGE OF THE SPRIALLY WRAPPED STRIP DRAWS THE STRIP TIGHTLY ABOUT THE CABLE CORE AND THE EXPOSED EDGE OF THE STRIP IS ROUNDED TO ALLEVIATE DISRUPTION IN THE FORMATION OF A JACKET AROUND THE WRAPPED CABLE CORE BY AN EXTRUDER, AND THEN C. PASSING THE WRAPPED CABLE CORE THROUGH A JACKETING EXTRUDER.
Claim 2
Independent Claim
129 words
A METHOD OF FORMING MULTI-CONDUCTOR CABLES HAVING A CABLE CORE CONSISTING OF A PLURALITY OF INSULATED CONDUCTORS, SAID METHOD COMPRISING THE STEPS OF A. SPIRALLY WRAPPING THE CABLE CORE WITH A STRIP OF TEREPHTHALATE POLYESTER, (1) THE LONGITUDINAL EDGES OF THE STRIP OVERLAPPING ONE ANOTHER TO COMPLETELY COVER THE CABLE CORE, B. PASSING THE WRAPPED CABLE CORE THROUGH A HEATED CHAMBER (1) TO HEAT THE TEREPHTHALATE POLYESTER STRIP TO A TEMPERATURE OF 120* TO 150*F., (2) WHEREBY SHRINKAGE OF THE SPRIALLY WRAPPED STRIP DRAWS THE STRIP TIGHTLY ABOUT THE CABLE CORE AND THE EXPOSED EDGE OF THE STRIP IS ROUNDED TO ALLEVIATE DISRUPTION IN THE FORMATION OF A JACKET AROUND THE WRAPPED CABLE CORE BY AN EXTRUDER, AND THEN C. PASSING THE WRAPPED CABLE CORE THROUGH A JACKETING EXTRUDER.
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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) | 1972-01-07 | 1972-07-08 | 1973-01-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-01-07 | 1976-07-08 | 1977-01-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-01-07 | 1980-07-08 | 1981-01-07 | $7700.00 | Window Closed / Lapsed |