US3206530A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of forming a lined conduit
Assignee: Grinnell Corp
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Filing: 1963-11-29
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Granted: 1965-09-14
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Expires: 1983-11-29
Abstract
No abstract record available.
Inventors
- 👤 Henry W Boteler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 22:18
CPC Classifications
F; F16; F16K; F16K27/00; F16K27/02; F16K27/0236; F16K27/0272; Y; Y10; Y10T; Y10T137/00; Y10T137/6851; Y10T137/7036
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
151 words
A METHOD OF FORMING A LINED PRESSURE CONDUIT WHICH COMPRISES THE STEPS OF MOLDING WITHIN A PRESSURE CONDUIT HOUSING A LINER OF A MATERIAL WHICH WHEN HEATED TO MOLDING TEMPERATURE HAS AN EXTERIOR SURFACE FITTING THE HOUSING INTERIOR SURFACE AND WHICH WHEN COOLED SHRINKS SUBSTANTIALLY TO HAVE AN EXTERIOR SURFACE APPROXIMATELY BUT NOT ACCURATELY FITTING SAID HOUSING INTERIOR SURFACE, IN JECTING A FLOWABLE INCOMPRESSIBLE FILLER MATERIAL THROUGH SAID HOUSING INTO GAPS WHICH EXIST DUE TO SAID SHRINKAGE OF SAID LINER BETWEEN SAID LINER EXTERIOR SURFACE AND SAID HOUSING INTERIOR SURFACE, SAID INJECTION OF SAID FILLER MATERIAL BEING OF SUFFICIENT QUANTITY AND UNDER SUFFICIENT PRESSURE SO AS TO CAUSE SAID FILLER MATERIAL TO FLOW INTO AND AT LEAST PARTLY FILL SAID GAPS TO THEREBY BRIDGE SAID GAPS BETWEEN SAID SURFACES, AND CONFINING SAID MATERIAL IN SAID GAPS, WHEREBY SAID LINER IS SUPPORTED BY SAID FILLER MATERIAL IN THE AREA OF SAID GAPS.
Claim 2
Independent Claim
151 words
A METHOD OF FORMING A LINED PRESSURE CONDUIT WHICH COMPRISES THE STEPS OF MOLDING WITHIN A PRESSURE CONDUIT HOUSING A LINER OF A MATERIAL WHICH WHEN HEATED TO MOLDING TEMPERATURE HAS AN EXTERIOR SURFACE FITTING THE HOUSING INTERIOR SURFACE AND WHICH WHEN COOLED SHRINKS SUBSTANTIALLY TO HAVE AN EXTERIOR SURFACE APPROXIMATELY BUT NOT ACCURATELY FITTING SAID HOUSING INTERIOR SURFACE, IN JECTING A FLOWABLE INCOMPRESSIBLE FILLER MATERIAL THROUGH SAID HOUSING INTO GAPS WHICH EXIST DUE TO SAID SHRINKAGE OF SAID LINER BETWEEN SAID LINER EXTERIOR SURFACE AND SAID HOUSING INTERIOR SURFACE, SAID INJECTION OF SAID FILLER MATERIAL BEING OF SUFFICIENT QUANTITY AND UNDER SUFFICIENT PRESSURE SO AS TO CAUSE SAID FILLER MATERIAL TO FLOW INTO AND AT LEAST PARTLY FILL SAID GAPS TO THEREBY BRIDGE SAID GAPS BETWEEN SAID SURFACES, AND CONFINING SAID MATERIAL IN SAID GAPS, WHEREBY SAID LINER IS SUPPORTED BY SAID FILLER MATERIAL IN THE AREA OF SAID GAPS.
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) | 1968-09-13 | 1969-03-15 | 1969-09-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-09-13 | 1973-03-15 | 1973-09-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-09-13 | 1977-03-15 | 1977-09-14 | $7700.00 | Window Closed / Lapsed |