US3265782A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for sealing mains
Assignee: ROSENGARTEN
•
Filing: 1965-01-25
•
Granted: 1966-08-09
•
Expires: 1985-01-25
Abstract
No abstract record available.
Inventors
- 👤 Jr Walter E Rosengarten
- 👤 Archibald T Flower
- 👤 David L Buchanan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 17:33
CPC Classifications
F; F16; F16L; F16L55/00; F16L55/16; F16L55/168; F16L55/178
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
99 words
A METHOD OF SEALING AN AREA OF AN UNDERGROUND CONDUIT CONTAINING FLUID UNDER SUPERATMOSPHERIC PRESSURE WHICH COMPRISES THE STEPS OF EXCAVATING A NARROW SHAFT ABOVE AN AREA OF THE CONDUIT TO BE SEALED, LOWERING INTO THE EXCAVATION AND DISPOSING IN OPEN POSITION PARTIALLY SURROUNDING THE CONDUIT A SPLIT ELASTOMERIC MOLD, CLOSING SAID MOLD ABOUT THE AREA OF THE CONDUIT TO BE SEALED, APPLYING RADIALLY INWARD FORCE TO THE OUTSIDE OF THE MOLD TO PRESS SAID MOLD INTO TIGHT RADIAL ENGAGEMENT WITH THE CONDUIT LEAVING A COMPLETELY ANNULAR SPACE BETWEEN SAID MOLD AND THE AREA OF THE CONDUIT TO BE
Claim 2
Independent Claim
99 words
A METHOD OF SEALING AN AREA OF AN UNDERGROUND CONDUIT CONTAINING FLUID UNDER SUPERATMOSPHERIC PRESSURE WHICH COMPRISES THE STEPS OF EXCAVATING A NARROW SHAFT ABOVE AN AREA OF THE CONDUIT TO BE SEALED, LOWERING INTO THE EXCAVATION AND DISPOSING IN OPEN POSITION PARTIALLY SURROUNDING THE CONDUIT A SPLIT ELASTOMERIC MOLD, CLOSING SAID MOLD ABOUT THE AREA OF THE CONDUIT TO BE SEALED, APPLYING RADIALLY INWARD FORCE TO THE OUTSIDE OF THE MOLD TO PRESS SAID MOLD INTO TIGHT RADIAL ENGAGEMENT WITH THE CONDUIT LEAVING A COMPLETELY ANNULAR SPACE BETWEEN SAID MOLD AND THE AREA OF THE CONDUIT TO BE
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) | 1969-08-08 | 1970-02-07 | 1970-08-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-08-08 | 1974-02-07 | 1974-08-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-08-08 | 1978-02-07 | 1978-08-09 | $7700.00 | Window Closed / Lapsed |