Patent US3216858A successfully refreshed from Google Patents.
US3216858A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of purging gas-conduit tubing in gas-filled electric cables
Assignee: Consolidated Edison Company of New York Inc
•
Filing: 1963-04-26
•
Granted: 1965-11-09
•
Expires: 1983-04-26
Abstract
No abstract record available.
Inventors
- 👤 John W Bogdanowski
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 04:37
CPC Classifications
H; H02; H02G; H02G15/00; H02G15/20; H02G15/26
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
136 words
THE METHOD OF PURGING SEEPAGE ACCUMULATIONS OF OIL FROM A GAS-CARRYING CONDIUT HAVING NOMINAL INSIDE DIAMETER OF ABOUT 0.25 INCH AND DISPOSED SUBSTANTIALLY WITHIN A CABLE SECTION OF A GAS-FILLED ELECTRIC POWER TRANSMISSION LINE COMPRISING THE STEPS OF DISCONNECTING SAID CONDIUT FROM SAID TRANSMISSION LINE TO PROVIDE OPPOSITE OPEN ENDS OF THE CONDIUT AT THE RESPECTIVE ENDS OF SAID CABLE SECTION, INSERTING A SUBSTANTIALLY RIGID CYLINCRICAL PLUG INTO ONE END OF SAID CONDIUT, SAID PLUG HAVING DIAMETER SUBSTANTIALLY EQUAL TO THE INTERNAL DIAMETER OF SAID CONDIUT WHEREBY SAID PLUG IS SLIDABLE WITHIN THE CONDIUT, AND IANTRODUCING NITROGEN GAS UNDER HIGH PRESSURE, UP TO ABOUT EIGHT HUNDRED (800) POUNDS PER SQUARE INCH, INTO SAID ONE END OF THE CONDIUT TO FORCE SAID PLUG TO SLIDE THERETHROUGH FROM SAID ONE END TO EMERGENCE AT THE OTHER END THEREOF.
Claim 2
Independent Claim
136 words
THE METHOD OF PURGING SEEPAGE ACCUMULATIONS OF OIL FROM A GAS-CARRYING CONDIUT HAVING NOMINAL INSIDE DIAMETER OF ABOUT 0.25 INCH AND DISPOSED SUBSTANTIALLY WITHIN A CABLE SECTION OF A GAS-FILLED ELECTRIC POWER TRANSMISSION LINE COMPRISING THE STEPS OF DISCONNECTING SAID CONDIUT FROM SAID TRANSMISSION LINE TO PROVIDE OPPOSITE OPEN ENDS OF THE CONDIUT AT THE RESPECTIVE ENDS OF SAID CABLE SECTION, INSERTING A SUBSTANTIALLY RIGID CYLINCRICAL PLUG INTO ONE END OF SAID CONDIUT, SAID PLUG HAVING DIAMETER SUBSTANTIALLY EQUAL TO THE INTERNAL DIAMETER OF SAID CONDIUT WHEREBY SAID PLUG IS SLIDABLE WITHIN THE CONDIUT, AND IANTRODUCING NITROGEN GAS UNDER HIGH PRESSURE, UP TO ABOUT EIGHT HUNDRED (800) POUNDS PER SQUARE INCH, INTO SAID ONE END OF THE CONDIUT TO FORCE SAID PLUG TO SLIDE THERETHROUGH FROM SAID ONE END TO EMERGENCE AT THE OTHER END THEREOF.
References Cited (Backward Citations)
US1547440A
Cited
US1683429A
Cited
US2567475A
Cited
US2623226A
Cited
US2763017A
Cited
US2874078A
Cited
US2906650A
Cited
US2930584A
Cited
US3091433A
Cited
US3119600A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-11-08 | 1969-05-10 | 1969-11-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-11-08 | 1973-05-10 | 1973-11-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-11-08 | 1977-05-10 | 1977-11-09 | $7700.00 | Window Closed / Lapsed |