US2721159A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making a molded pipe joint
Assignee: Individual
•
Filing: 1952-12-04
•
Granted: 1955-10-18
•
Expires: 1972-12-04
Abstract
No abstract record available.
Inventors
- 👤 James C Johnston
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 08:03
CPC Classifications
F; F16; F16L; F16L13/00; F16L13/10; F16L13/106
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
138 words
THE METHOD OF JOINING A SECTION OF GLAZED VITRIFIED CLAY PIPE HAVING A SPIGOT END TO A SOCKET WHICH COMPRISES MOLDING A RING OF SEALING MATERIAL WITH A TAPERED INNER SURFACE WITHIN THE SOCKET, GRINDING THE EXTERIOR OF THE SPIGOT END OF THE PIPE SECTION TO REMOVE THE GLAZE THEREFROM AND PROVIDE A POROUS, TAPERED OUTER SURFACE ADAPTED TO FIT AND INNER SURFACE OF SAID RING, COATING SAID POROUS SURFACE WITH A THIN SUBSTANTIALLY UNIFORM LAYER OF SEALING MATERIAL IN A FLUID STATE, PERMITTING SAID LAYER TO PENETRATE SAID POROUS SURFACE AND SOLIDIFY, APPLYING A VOLATILE SOLVENT FOR SAID SEALING MATERIAL TO SOFTEN THE INNER SURFACE OF SAID RING AND SAID COATING, AND FITTING SAID SURFACES TOGETHER, THEREBY TO BOND SAID OUTER SURFACE OF SAID SPIGOT TO THE INNER SURFACE OF SAID RING UPON EVAPORATION OF SAID SOLVENT.
Claim 2
Independent Claim
138 words
THE METHOD OF JOINING A SECTION OF GLAZED VITRIFIED CLAY PIPE HAVING A SPIGOT END TO A SOCKET WHICH COMPRISES MOLDING A RING OF SEALING MATERIAL WITH A TAPERED INNER SURFACE WITHIN THE SOCKET, GRINDING THE EXTERIOR OF THE SPIGOT END OF THE PIPE SECTION TO REMOVE THE GLAZE THEREFROM AND PROVIDE A POROUS, TAPERED OUTER SURFACE ADAPTED TO FIT AND INNER SURFACE OF SAID RING, COATING SAID POROUS SURFACE WITH A THIN SUBSTANTIALLY UNIFORM LAYER OF SEALING MATERIAL IN A FLUID STATE, PERMITTING SAID LAYER TO PENETRATE SAID POROUS SURFACE AND SOLIDIFY, APPLYING A VOLATILE SOLVENT FOR SAID SEALING MATERIAL TO SOFTEN THE INNER SURFACE OF SAID RING AND SAID COATING, AND FITTING SAID SURFACES TOGETHER, THEREBY TO BOND SAID OUTER SURFACE OF SAID SPIGOT TO THE INNER SURFACE OF SAID RING UPON EVAPORATION OF SAID SOLVENT.
References Cited (Backward Citations)
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Cited
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Cited
US1893599A
Cited
US2388846A
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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) | 1958-10-17 | 1959-04-18 | 1959-10-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-10-17 | 1963-04-18 | 1963-10-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-10-17 | 1967-04-18 | 1967-10-18 | $7700.00 | Window Closed / Lapsed |