US3132415A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of replacing conductors in a flexible plastic conduit
Assignee: Individual
•
Filing: 1963-05-03
•
Granted: 1964-05-12
•
Expires: 1983-05-03
Abstract
No abstract record available.
Inventors
- 👤 John E Johnson
- 👤 Leland D Cropper
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 00:24
CPC Classifications
H; H02; H02G; H02G1/00; H02G1/06; H02G1/08; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49718; Y10T29/49721; Y10T29/4973; Y10T29/49805; Y10T29/49815; Y10T29/49822
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
136 words
THE METHOD OF REMOVING A CONDUCTOR FROM AN ASSEMBLY COMPRISING A DUCT OF STRONG, TOUGH, RESILIENT AND FLEXIBLE PLASTIC MATERIAL HAVING ENCLOSED THEREIN AT LEAST ONE COEXTENSIVE FLEXIBLE CONDUCTOR WITH A CONDUCTOR CROSSSECTIONAL AREA NOT IN EXCESS OF ABOUT 60 PERCENT OF THE INITIAL CROSS-SECTIONAL AREA OF THE DUCT BORE, SAID ASSEMBLY HAVING A SUBSTANTIAL PORTION THEREOF BURIED IN THE EARTH AND SAID DUCT BEING DEFORMED FROM AN INITIAL EXTERNAL CONVEX CURVED WALL SHAPE BY SOIL PRESSURE TO SUCH AN EXTENT AS TO BIND ON SAID CONDUCTOR AND PREVENT ITS WITHDRAWAL WITHOUT APPLYING EXCESSIVE TENSION THERETO, WHICH COMPRISES TEMPORARILY SEALING SAID DUCT AT ONE END AGAINST INTERNAL FLUID PRESSURE AND APPLYING FLUID PRESSURE INTO SAID DUCT AT THE OTHER END UNTIL THE CROSS-SECTIONAL AREA OF THE BORE OF THE DEFORMED DUCT HAS BEEN INCREASED TO THE
Claim 2
Independent Claim
136 words
THE METHOD OF REMOVING A CONDUCTOR FROM AN ASSEMBLY COMPRISING A DUCT OF STRONG, TOUGH, RESILIENT AND FLEXIBLE PLASTIC MATERIAL HAVING ENCLOSED THEREIN AT LEAST ONE COEXTENSIVE FLEXIBLE CONDUCTOR WITH A CONDUCTOR CROSSSECTIONAL AREA NOT IN EXCESS OF ABOUT 60 PERCENT OF THE INITIAL CROSS-SECTIONAL AREA OF THE DUCT BORE, SAID ASSEMBLY HAVING A SUBSTANTIAL PORTION THEREOF BURIED IN THE EARTH AND SAID DUCT BEING DEFORMED FROM AN INITIAL EXTERNAL CONVEX CURVED WALL SHAPE BY SOIL PRESSURE TO SUCH AN EXTENT AS TO BIND ON SAID CONDUCTOR AND PREVENT ITS WITHDRAWAL WITHOUT APPLYING EXCESSIVE TENSION THERETO, WHICH COMPRISES TEMPORARILY SEALING SAID DUCT AT ONE END AGAINST INTERNAL FLUID PRESSURE AND APPLYING FLUID PRESSURE INTO SAID DUCT AT THE OTHER END UNTIL THE CROSS-SECTIONAL AREA OF THE BORE OF THE DEFORMED DUCT HAS BEEN INCREASED TO THE
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) | 1967-05-12 | 1967-11-11 | 1968-05-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-05-12 | 1971-11-11 | 1972-05-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-05-12 | 1975-11-11 | 1976-05-12 | $7700.00 | Window Closed / Lapsed |