Patent US3204989A successfully refreshed from Google Patents.
US3204989A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pipe joint
Assignee: BARLOW CORP
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Filing: 1962-06-05
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Granted: 1965-09-07
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Expires: 1982-06-05
Abstract
No abstract record available.
Inventors
- 👤 Edward B Wilson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 23:28
CPC Classifications
F; F16; F16L; F16L25/00; F16L25/02; F16L25/026; F16L23/00; F16L23/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
176 words
AN ELECTRICALLY INSULATED PIPE JOINT COMPRISING OPPOSED, METALLIC MATCHING FLANGES ATTACHED TO ADJOINING PIPE SECTIONS, ELECTRICALLY INSULATED SALING MEANS DISPOSED BETWEEN AND ASSOCIATED WITH SAID MATCHING FLANGES ADAPTED UPON COMPRESSION BETWEEN SAID FLANGES TO PREVENT LEAKAGE OF FLUID FROM THE JOINT AND PASSAGE OF ELECTRIC CURRENT BETWEEN THE FLANGES, A PLURALITY OF BOLTS DISPOSED AROUND SAID FLANGES ADAPTED TO MAINTAIN THE FLANGES AND SAID MEANS UNDER COMPRESSION COMPRISING BOLTS ENCLOSING ELECTRICAL INSULATING SLEEVE MEMBERS EXTENDING THROUGH SAID REGISTERING HOLES IN SAID FLANGES, SAID SLEEVE MEMBERS TERMINATING BEYOND THE OUTER FACES OF SAID FLANGES, NUTS ON SAID BOLTS, RING MEANS DISPOSED ADJACENT SAID NUTS, SAID RING MEANS HAVING A BORE AND A COUNTER BORE THEREIN, SAID BORE RECEIVING SAID BOLT AND SAID COUNTER BORE RECEIVING THE TERMINAL END OF SAID SLEEVE MEMBER, ELECTRICAL INSULATING WASHERS DISPOSED AROUND SAID SLEEVE MEMBERS AND BETWEEN SAID RING MEANS AND THE OUTER FACES OF SAID FLANGES, A COUNTER BORE FORMED IN SAID WASHERS PROVIDING AN ANNULAR RECESS OPENING TOWARD SAID FLANGE OUTER FACES, A RING OF RESILIENT ELECTRICAL INSULATION MATERIAL DEFORM-
Claim 2
Dependent Claim
176 words
AN ELECTRICALLY INSULATED PIPE JOINT COMPRISING OPPOSED, METALLIC MATCHING FLANGES ATTACHED TO ADJOINING PIPE SECTIONS, ELECTRICALLY INSULATED SALING MEANS DISPOSED BETWEEN AND ASSOCIATED WITH SAID MATCHING FLANGES ADAPTED UPON COMPRESSION BETWEEN SAID FLANGES TO PREVENT LEAKAGE OF FLUID FROM THE JOINT AND PASSAGE OF ELECTRIC CURRENT BETWEEN THE FLANGES, A PLURALITY OF BOLTS DISPOSED AROUND SAID FLANGES ADAPTED TO MAINTAIN THE FLANGES AND SAID MEANS UNDER COMPRESSION COMPRISING BOLTS ENCLOSING ELECTRICAL INSULATING SLEEVE MEMBERS EXTENDING THROUGH SAID REGISTERING HOLES IN SAID FLANGES, SAID SLEEVE MEMBERS TERMINATING BEYOND THE OUTER FACES OF SAID FLANGES, NUTS ON SAID BOLTS, RING MEANS DISPOSED ADJACENT SAID NUTS, SAID RING MEANS HAVING A BORE AND A COUNTER BORE THEREIN, SAID BORE RECEIVING SAID BOLT AND SAID COUNTER BORE RECEIVING THE TERMINAL END OF SAID SLEEVE MEMBER, ELECTRICAL INSULATING WASHERS DISPOSED AROUND SAID SLEEVE MEMBERS AND BETWEEN SAID RING MEANS AND THE OUTER FACES OF SAID FLANGES, A COUNTER BORE FORMED IN SAID WASHERS PROVIDING AN ANNULAR RECESS OPENING TOWARD SAID FLANGE OUTER FACES, A RING OF RESILIENT ELECTRICAL INSULATION MATERIAL DEFORM-
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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) | 1968-09-06 | 1969-03-08 | 1969-09-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-09-06 | 1973-03-08 | 1973-09-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-09-06 | 1977-03-08 | 1977-09-07 | $7700.00 | Window Closed / Lapsed |