Patent US3204274A successfully refreshed from Google Patents.
US3204274A
Expired / Lapsed
US
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Pipe line plug device
Assignee: Individual
•
Filing: 1962-12-24
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Granted: 1965-09-07
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Expires: 1982-12-24
Abstract
No abstract record available.
Inventors
- 👤 Mary M Knapp
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 17:00
CPC Classifications
B; B08; B08B; B08B9/00; B08B9/02; B08B9/027; B08B9/04; B08B9/053; B08B9/055; B08B9/0553
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
132 words
FOR USE AS A PIPE LINE PLUG PROPELLED THROUGH THE INTERIOR OF A PIPE BY A PRESSURE GRADIENT, A MOLDED CYLINDRICAL POLYURETHANE BODY MEMBER, MEANS ON THE BODY POSITIONED FOR ENGAGEMENT WITH THE SURROUNDING WALL OF PIPE TO APPLY A FORCE TO THE BODY MEMBER TENDING TO COMPRESS THE MEMBER LONGITUDINALLY UNDER THE INFLUENCE OF SAID PRESSURE GRADIENT; AND A BAND OF ABRASIVE HELICALLY CARRIED ABOUT SAID BODY MEMBER, THE SPRINGY PROPERTY OF SAID BODY MEMBER AND PITCH OF SAID ABRASIVE BEING SUCH THAT SAID BODY MEMBER IS ADAPTED TO BE COMPRESSED LONGITUDIALLY UNDER THE INFLUENCE OF SAID PRESSURE TO APPLY A FORCE TO SAID BAND TENDING TO SHORTEN THE AXIAL LENGTH OF THE BAND TO INCREASE THE PRESSURE EXERTED BY THE BAND RADIALLY OUTWARDLY AGAINST THE SURROUNDING WALL OF THE PIPE.
Claim 2
Dependent Claim
132 words
FOR USE AS A PIPE LINE PLUG PROPELLED THROUGH THE INTERIOR OF A PIPE BY A PRESSURE GRADIENT, A MOLDED CYLINDRICAL POLYURETHANE BODY MEMBER, MEANS ON THE BODY POSITIONED FOR ENGAGEMENT WITH THE SURROUNDING WALL OF PIPE TO APPLY A FORCE TO THE BODY MEMBER TENDING TO COMPRESS THE MEMBER LONGITUDINALLY UNDER THE INFLUENCE OF SAID PRESSURE GRADIENT; AND A BAND OF ABRASIVE HELICALLY CARRIED ABOUT SAID BODY MEMBER, THE SPRINGY PROPERTY OF SAID BODY MEMBER AND PITCH OF SAID ABRASIVE BEING SUCH THAT SAID BODY MEMBER IS ADAPTED TO BE COMPRESSED LONGITUDIALLY UNDER THE INFLUENCE OF SAID PRESSURE TO APPLY A FORCE TO SAID BAND TENDING TO SHORTEN THE AXIAL LENGTH OF THE BAND TO INCREASE THE PRESSURE EXERTED BY THE BAND RADIALLY OUTWARDLY AGAINST THE SURROUNDING WALL OF THE PIPE.
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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 |